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    2096 results match your criteria Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes[Journal]

    1 OF 42

    Reducing Wait Time for Lung Cancer Diagnosis and Treatment: Impact of a Multidisciplinary, Centralized Referral Program.
    Can Assoc Radiol J 2018 Jun 4. Epub 2018 Jun 4.
    Faculty of Medicine, Memorial University of Newfoundland, Health Sciences Centre, St John's, Newfoundland, Canada; Department of Diagnostic Imaging, Eastern Health, Health Sciences Centre, St John's, Newfoundland, Canada. Electronic address:
    Background: A multidisciplinary, centralized referral program was established at our institution in 2014 to reduce delays in lung cancer diagnosis and treatment following diagnostic imaging observed with the traditional, primary care provider-led referral process. The main objectives of this retrospective cohort study were to determine if referral to a Thoracic Triage Panel (TTP): 1) expedites lung cancer diagnosis and treatment initiation; and 2) leads to more appropriate specialist consultation.

    Methods: Patients with a diagnosis of lung cancer and initial diagnostic imaging between March 1, 2015, and February 29, 2016, at a Memorial University-affiliated tertiary care centre in St John's, Newfoundland, were identified and grouped according to whether they were referred to the TTP or managed through a traditional referral process. Read More

    What Are the Indications for Prophylactic Embolization of Renal Angiomyolipomas? A Review of the Current Evidence in the Literature.
    Can Assoc Radiol J 2018 May 24. Epub 2018 May 24.
    Department of Radiology, Mater Misericordiae University Hospital, Dublin, Ireland.
    Renal angiomyolipomas (AMLs) are benign tumours that may occur sporadically in the general population or in patients with tuberous sclerosis complex. The concern with AMLs is that of retroperitoneal hemorrhage, which can be fatal. Classically the trigger for prophylactic intervention was thought to be an AML diameter of ≥4 cm. Read More

    Ultrasound of the Distal Insertions of the Ankle and Foot Tendons With Anatomical Correlation: A Review.
    Can Assoc Radiol J 2018 May 15. Epub 2018 May 15.
    Department of Radiology, Universitair Ziekenhuis Brussel, Brussels, Belgium.
    The distal insertions of the tendons crossing the ankle as well as the tendons originating in the foot are less well known by radiologists. We review the anatomy and ultrasound appearance of these insertions using our own cadaveric sectioning and dissection. The ultrasound images were correlated with anatomical slices. Read More

    Magnetic Resonance Imaging of Cysts, Cystlike Lesions, and Their Mimickers Around the Knee Joint.
    Can Assoc Radiol J 2018 May;69(2):197-214
    Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Republic of Singapore.
    While interpreting routine magnetic resonance imaging (MRI) of the knee joint, a radiologist may encounter various cystic lesions such as ganglion, synovial, and meniscal cysts, among others. In some cases, MRI may demonstrate cystlike lesions around the knee due to fluid distention of normal bursa and recesses, the diagnosis of which should not be difficult if a radiologist is familiar with their characteristic location and MRI appearance. In addition, there are cyst mimickers such as hematomas, abscesses, vascular lesions, and neoplasms around knee joint that may pose a diagnostic challenge on routine MRI. Read More

    Mammography Clinical Image Quality and the False Positive Rate in a Canadian Breast Cancer Screening Program.
    Can Assoc Radiol J 2018 May;69(2):169-175
    Bureau d'information et d'études en santé des populations, Institut national de santé publique du Québec, Québec City, Québec, Canada; Département de médecine sociale et préventive, Faculté de médecine, Université Laval, Québec City, Québec, Canada; Axe Oncologie, Centre de recherche du CHU de Québec, Québec City, Québec, Canada.
    Purpose: The study sought to determine if mammography quality is associated with the false positive (FP) rate in the Quebec breast cancer screening program in 2004 and 2005.

    Methods: Mammography quality of a random sample of screen-film mammograms was evaluated by an expert radiologist following the criteria of the Canadian Association of Radiologists. For each screening examination, scores ranging from 1 (poor quality) to 5 (excellent quality) were attributed for positioning, compression, contrast, exposure level, sharpness, and artifacts. Read More

    Endoclip Magnetic Resonance Imaging Screening: A Local Practice Review.
    Can Assoc Radiol J 2018 May;69(2):162-168
    College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Department of Medical Imaging, Saskatoon Health Region and University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
    Purpose: Not all endoscopically placed clips (endoclips) are magnetic resonance imaging (MRI) compatible. At many institutions, endoclip screening is part of the pre-MRI screening process. Our objective is to determine the contribution of each step of this endoclip screening protocol in determining a patient's endoclip status at our institution. Read More

    Gadolinium-Based Contrast Agents in Kidney Disease: Comprehensive Review and Clinical Practice Guideline Issued by the Canadian Association of Radiologists.
    Can Assoc Radiol J 2018 May;69(2):136-150
    Division of Nephrology, Department of Medicine and Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada.
    Use of gadolinium-based contrast agents (GBCAs) in renal impairment is controversial, with physician and patient apprehension in acute kidney injury (AKI), chronic kidney disease (CKD), and dialysis because of concerns regarding nephrogenic systemic fibrosis (NSF). The position that GBCAs are absolutely contraindicated in AKI, CKD stage 4 or 5 (estimated glomerular filtration rate [eGFR] <30 mL/min/1.73 m) and dialysis-dependent patients is outdated, and may limit access to clinically necessary contrast-enhanced MRI examinations. Read More

    Canadian Association of Radiologists White Paper on Artificial Intelligence in Radiology.
    Can Assoc Radiol J 2018 May 11;69(2):120-135. Epub 2018 Apr 11.
    Department of Radiology, National Jewish Health, Denver, Colorado, USA.
    Artificial intelligence (AI) is rapidly moving from an experimental phase to an implementation phase in many fields, including medicine. The combination of improved availability of large datasets, increasing computing power, and advances in learning algorithms has created major performance breakthroughs in the development of AI applications. In the last 5 years, AI techniques known as deep learning have delivered rapidly improving performance in image recognition, caption generation, and speech recognition. Read More

    The Accuracy of Colorectal Cancer Detection by Computed Tomography in the Unprepared Large Bowel in a Community-Based Hospital.
    Can Assoc Radiol J 2018 Feb;69(1):92-96
    Department of Radiology, Lions Gate Hospital, North Vancouver, British Columbia, Canada.
    Purpose: This retrospective study examined the performance of general radiologists in a community-based hospital in detecting colorectal cancer (CRC) with computed tomography (CT) in the unprepared large bowel.

    Methods: The pathology database at a community hospital over the past 7 years (2009-2015) was retrospectively analysed for pathologically proven CRC (924 cases). The provincial hospital information profile for these patients was reviewed to determine if they had an abdominal CT for any reason in the year prior to biopsy. Read More

    Magnetic Resonance Imaging and Computed Tomography of Cardiac Masses and Pseudomasses in the Atrioventricular Groove.
    Can Assoc Radiol J 2018 Feb;69(1):78-91
    Department of Radiology, Mayo Clinic, Rochester, Minnesota. Electronic address:
    The atrioventricular (AV) groove constitutes the anatomic space separating the atria and ventricles. The AV groove is often difficult to visualize at echocardiography, and suspected lesions can be further assessed with cardiac computed tomography or magnetic resonance imaging. AV groove lesions may originate from within the AV groove or extend into this space from adjacent structures. Read More

    Incidence and Economic Impact of Incidental Findings on F-FDG PET/CT Imaging.
    Can Assoc Radiol J 2018 Feb;69(1):63-70
    Department of Medical Imaging, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
    Purpose: The study sought to determine the incidence of incidental findings on whole-body positron emission tomography with computed tomography (PET/CT) imaging and the average costs of investigations to follow-up or further characterize incidental findings.

    Methods: Imaging reports of 215 patients who underwent whole-body PET/CT imaging were retrospectively reviewed. Our provincial picture archiving and communication system was queried and patient charts were reviewed to identify all investigations performed to follow-up incidental findings within 1 year of the initial PET/CT study. Read More

    Percutaneous Liver Tumour Ablation: Image Guidance, Endpoint Assessment, and Quality Control.
    Can Assoc Radiol J 2018 Feb;69(1):51-62
    Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands.
    Liver tumour ablation nowadays represents a routine treatment option for patients with primary and secondary liver tumours. Radiofrequency ablation and microwave ablation are the most widely adopted methods, although novel techniques, such as irreversible electroporation, are quickly working their way up. The percutaneous approach is rapidly gaining popularity because of its minimally invasive character, low complication rate, good efficacy rate, and repeatability. Read More

    Irreversible Electroporation in Hepatopancreaticobiliary Tumours.
    Can Assoc Radiol J 2018 Feb;69(1):38-50
    Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands.
    Hepatopancreaticobiliary tumours are often diagnosed at an advanced disease stage, in which encasement or invasion of local biliary or vascular structures has already occurred. Irreversible electroporation (IRE) is an image-guided tumour ablation technique that induces cell death by exposing the tumour to high-voltage electrical pulses. The cellular membrane is disrupted, while sparing the extracellular matrix of critical tubular structures. Read More

    Clinical Image Quality and Sensitivity in an Organized Mammography Screening Program.
    Can Assoc Radiol J 2018 Feb;69(1):16-23
    Institut national de santé publique du Québec, Quebec City, Québec, Canada; Département de médecine sociale et préventive, Faculté de Médecine, Université Laval, Quebec City, Québec, Canada; Axe Oncologie, Centre de Recherche du CHU de Québec, Quebec City, Québec, Canada.
    Purpose: The study sought to examine the association between clinical image quality of mammograms and screening sensitivity.

    Methods: Four radiologists evaluated the clinical image quality of 374 invasive screen-detected cancers and 356 invasive interval breast cancers for which quality evaluation of screening mammograms could be assessed from cancers diagnosed among participants in the Quebec Breast Cancer Screening Program in 2007. Quality evaluation was based on the Canadian Association of Radiologists accreditation criteria, which are similar to those of the American College of Radiology. Read More

    Post-Vacuum-Assisted Stereotactic Core Biopsy Clip Displacement: A Comparison Between Commercially Available Clips and Surgical Clip.
    Can Assoc Radiol J 2018 Feb;69(1):10-15
    Breast Health Program, BC Women's Hospital and Health Centre, Vancouver, Canada; Department of Radiology, University of British Columbia, Vancouver, British Columbia, Canada.
    Purpose: The placement of localization clips following percutaneous biopsy is a standard practice for a variety of situations. Subsequent clip displacement creates challenges for imaging surveillance and surgical planning, and may cause confusion amongst radiologists and between surgeons and radiologists. Many causes have been attributed for this phenomenon including the commonly accepted "accordion effect. Read More

    Financial Impact of PEVAR Compared With Standard Endovascular Repair in Canadian Hospitals.
    Can Assoc Radiol J 2018 May 1;69(2):215-219. Epub 2018 Feb 1.
    Division of Vascular and Interventional Radiology, Toronto General Hospital, Toronto, Ontario, Canada.
    Objectives: The percutaneous endovascular abdominal aortic repair (PEVAR) approach is a minimally invasive technique that has demonstrated clinical benefit over traditional surgical cut down associated with standard endovascular abdominal aortic aneurysm (AAA) repair (EVAR). The objective of our study was to evaluate the budget impact to a Canadian hospital of changing the technique for AAA repair from the EVAR approach to the PEVAR approach.

    Methods: We examined the budget impact of replacing the EVAR approach with the PEVAR approach in a Canadian hospital that performs 100 endovascular AAA repairs annually. Read More

    Laparoscopic Sleeve Gastrectomy: A Radiological Guide to Common Postsurgical Failure.
    Can Assoc Radiol J 2018 May 1;69(2):184-196. Epub 2018 Feb 1.
    Department of Radiology, McGill University Health Center, McGill University, Montreal, Quebec, Canada.
    Laparoscopic sleeve gastrectomy is one of the most common bariatric procedures worldwide. It has recently gained in popularity because of a low complication rate, satisfactory resolution of comorbidities, and excellent weight loss outcome. This article reviews the surgical technique, expected postsurgical imaging appearance, and imaging findings of common complications after laparoscopic sleeve gastrectomy. Read More

    Staging Computed Tomography in Patients With Noncurative Laparotomy for Periampullary Cancer: Does Nonstructured Reporting Adequately Communicate Resectability?
    Can Assoc Radiol J 2018 Feb 7;69(1):97-104. Epub 2017 Dec 7.
    Department of Radiology, London Health Sciences Centre, London, Ontario, Canada; Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.

    A Day in the Life of MRI: The Variety and Appropriateness of Exams Being Performed in Canada.
    Can Assoc Radiol J 2018 May 1;69(2):151-161. Epub 2017 Dec 1.
    Department of Medical Imaging, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
    Purpose: This study aimed to determine the volumes and types of magnetic resonance imaging exams being performed across Canada, common indications for the exams, and exam appropriateness using multiple evaluation tools.

    Methods: Thirteen academic medical institutions across Canada participated. Data were obtained relating to a single common day, October 1, 2014. Read More

    Comparison of General Anesthesia and Conscious Sedation During Computed Tomography-Guided Radiofrequency Ablation of T1a Renal Cell Carcinoma.
    Can Assoc Radiol J 2018 Feb 1;69(1):24-29. Epub 2017 Dec 1.
    Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
    Purpose: Percutaneous radiofrequency ablation is so painful that this treatment requires pain control such as conscious sedation or general anesthesia. It is still unclear which type of anesthesia is better for treatment outcomes of renal cell carcinoma. This study aimed to compare general anesthesia and conscious sedation in treating patients with renal cell carcinoma with radiofrequency ablation. Read More

    Informed Consent for Radiation in Interventional Radiology Procedures.
    Can Assoc Radiol J 2018 Feb 29;69(1):30-37. Epub 2017 Nov 29.
    Victoria Hospital, London Health Sciences Centre, Department of Medical Imaging, Western University, London, Ontario, Canada.
    Purpose: To explore the patient perception on radiation-related cancer risk from interventional radiology (IR) procedures and whether informed radiation consent is warranted.

    Methods: A multiple-choice survey was prospectively administered to 68 adults undergoing a body or neuro-IR procedure with ionizing radiation exposure. Subgroup analysis with chi-square or Fisher exact test was performed based on patient past IR history (P < . Read More

    What Is the Role of the Bacterium Propionibacterium acnes in Type 1 Modic Changes? A Review of the Literature.
    Can Assoc Radiol J 2017 Nov 3;68(4):419-424. Epub 2017 Oct 3.
    Joint Department of Medical Imaging, University Health Network, Toronto, Ontario, Canada.
    This review presents a summary of the pathology and epidemiology of Modic changes and the possible role of Propionibacterium acnes. This information is followed by a synthesis of the most recent clinical research involved in culturing the discs of patients with degenerative disc disease for the presence of bacteria. We also discuss a randomized controlled trial that investigates the effects of antibiotics on patients with chronic low back pain and type 1 Modic changes. Read More

    Variable Appearances of Ductal Carcinoma In Situ Calcifications on Digital Mammography, Synthesized Mammography, and Tomosynthesis: A Pictorial Essay.
    Can Assoc Radiol J 2018 Feb 22;69(1):2-9. Epub 2017 Sep 22.
    Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
    This pictorial essay demonstrates the variable appearances of ductal carcinoma in situ on full-field digital mammography, synthesized mammography, and digital breast tomosynthesis. The spectrum of intercase and intracase variability suggests further refinement of reconstruction algorithms for synthesized mammography may be necessary to maximize early detection of ductal carcinoma in situ. Read More

    Comparative Evaluation of Iodine-125 Radioactive Seed Localization and Wire Localization for Resection of Breast Lesions.
    Can Assoc Radiol J 2017 Nov 15;68(4):447-455. Epub 2017 Sep 15.
    Breast Imaging Center, Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada. Electronic address:
    Purpose: Radioactive seed localization (RSL) uses a titanium seed labeled with iodine-125 energy for surgery of nonpalpable breast lesions. RSL facilitates radiology-surgery scheduling and allows for improved oncoplasty compared with wire localization (WL). The purpose of this work was to compare the 2 techniques. Read More

    Antithrombotic Use Predicts Recanalization of Embolized Pulmonary Arteriovenous Malformations in Hereditary Hemorrhagic Telangiectasia.
    Can Assoc Radiol J 2017 11 15;68(4):463-467. Epub 2017 Sep 15.
    Department of Radiology, St Michael's Hospital, Toronto, Ontario, Canada; Keenan Research Centre of the Li Ka Shing Knowledge Institute and St Michaels Hospital, Toronto, Ontario, Canada; Department of Medical Imaging, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.

    Magnetic Resonance Signal Abnormalities Within the Pericruciate Fat Pad: A Possible Secondary Sign for Acute Anterior Cruciate Ligament Tears.
    Can Assoc Radiol J 2017 Nov 6;68(4):438-444. Epub 2017 Sep 6.
    Postgraduate School in Radiodiagnostics, Università degli Studi di Milano, Milan, Italy. Electronic address:
    Purpose: The study sought to investigate the presence of magnetic resonance (MR) signal alterations within the pericruciate fat pad in patients with an acute anterior cruciate ligament (ACL) tear as well as evaluate its diagnostic value in comparison with the main secondary signs of ACL tears.

    Methods: Two musculoskeletal radiologists retrospectively reviewed knee MR examinations performed from May to October 2015. The ACL was considered as torn or intact based on either previous arthroscopic findings or unequivocal MR imaging interpretation if arthroscopic correlation was unavailable. Read More

    Imaging of Ankle Impingement Syndromes.
    Can Assoc Radiol J 2017 Nov 31;68(4):431-437. Epub 2017 Aug 31.
    Department of Diagnostic Radiology, Khoo Teck Puat Hospital, Republic of Singapore. Electronic address:
    Ankle impingement syndromes are a commonly encountered clinical entity seen in athletes, secondary to repetitive forceful microtrauma. Symptoms are related to impingement of osseous or soft tissue abnormalities in the ankle joint, in particular the tibiotalar joint, which may result in painful limitation of ankle movements. Imaging modalities, such as radiographs and magnetic resonance imaging, are very useful in diagnosing osseous and soft tissue abnormalities seen in different types of ankle impingement syndromes. Read More

    The Positive Outcome of MRI-Guided Vacuum Assisted Core Needle Breast Biopsies Is Not Influenced by a Prior Negative Targeted Second-Look Ultrasound.
    Can Assoc Radiol J 2017 Nov 21;68(4):401-408. Epub 2017 Aug 21.
    Cedar Breast Clinic, McGill University Health Center, Royal Victoria Hospital, Montréal, Québec, Canada; Département d'imagerie médicale, Centre République, Clermont-Ferrand, France. Electronic address:
    Purpose: The study sought to investigate the outcome of breast magnetic resonance-guided biopsies as a function of the indication for magnetic resonance imaging (MRI), the MRI features of the lesions, and the performance or not of a targeted second-look ultrasound (SLUS) prior breast MRI-guided biopsy.

    Methods: We identified 158 women with MRI-detected breast lesions scheduled for MRI-guided biopsy (2007-2013). Patient demographics, performance of targeted SLUS, imaging characteristics, and subsequent pathology results were reviewed. Read More

    Risk Stratification in Multinodular Goiter: A Retrospective Review of Sonographic Features, Histopathological Results, and Cancer Risk.
    Can Assoc Radiol J 2017 Nov 21;68(4):425-430. Epub 2017 Aug 21.
    Department of Radiology, Adelaide Meath Incorporating the National Children's Hospital, Tallaght, Ireland.
    Purpose: In the management of thyroid nodules, although the potential for malignancy exists, there is also the potential for overtreatment of subclinical disease. Although the TI-RADS (Thyroid Imaging-Reporting and Data System) system outlines a risk stratification score based on suspicious ultrasound findings, it has not been universally accepted. Many TI-RADS 2 or 3 patients proceed to fine needle aspiration biopsy (FNAB), potentially unnecessarily. Read More

    Utility of Magnetic Resonance Imaging for the Diagnosis of Appendicitis During Pregnancy: A Canadian Experience.
    Can Assoc Radiol J 2017 Nov 18;68(4):392-400. Epub 2017 Jul 18.
    Department of Surgery, St Paul's Hospital & University of British Columbia, Vancouver, British Columbia, Canada.
    Purpose: The objective of the study was to evaluate the performance of magnetic resonance imaging (MRI) for the diagnosis of appendicitis during pregnancy.

    Methods: We conducted a retrospective review of all MRI scans performed at our institution, between 2006 and 2012, for the evaluation of suspected appendicitis in pregnant women. Details of the MRI scans performed were obtained from the radiology information system as well as details of any ultrasounds carried out for the same indication. Read More

    Assessment of Cirrhotic Liver Enhancement With Multiphasic Computed Tomography Using a Faster Injection Rate, Late Arterial Phase, and Weight-Based Contrast Dosing.
    Can Assoc Radiol J 2017 Nov 15;68(4):371-378. Epub 2017 Jul 15.
    Department of Diagnostic Radiology, QE II Health Sciences Centre, Dalhousie University, Halifax, Nova Scotia, Canada. Electronic address:
    Purpose: This study aimed to update our liver computed tomography (CT) protocol according to published guidelines, and to quantitatively evaluate the effect of these modifications.

    Methods: The modified liver CT protocol employed a faster injection rate (5 vs 3 mL/s), later arterial phase (20-second vs 10-second postbolus trigger), and weight-based dosing of iodinated contrast (1.7 mL/kg vs 100 mL fixed dose). Read More

    Global Health Imaging in Radiology Residency: A Survey of Canadian Radiology Residents.
    Can Assoc Radiol J 2017 Nov 15;68(4):348-356. Epub 2017 Jul 15.
    Department of Medical Imaging, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada; London Health Sciences Centre, Victoria Hospital, London, Ontario, Canada.
    Purpose: The study sought to determine Canadian radiology resident perception of and interest in global health imaging (GHI) and the barriers they encounter in pursuing GHI experiences during residency training.

    Methods: A peer-reviewed, online, anonymous, multiple-choice survey was distributed to Canadian radiology residents at English-language programs.

    Results: Fifty residents responded to the survey (∼16% response rate); 72% of respondents perceived an unmet need for medical imaging in the developing world. Read More

    Multiparametric Magnetic Resonance Imaging of the Prostate for Tumour Detection and Local Staging: Imaging in 1.5T and Histopathologic Correlation.
    Can Assoc Radiol J 2017 Nov 15;68(4):379-386. Epub 2017 Jul 15.
    Second Department of Radiology, General University Hospital Attikon, Haidari, Athens, Greece.
    Purpose: The study sought to prospectively evaluate which technique among T2-weighted images, dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI), diffusion-weighted (DW) MRI, or a combination of the 2, is best suited for prostate cancer detection and local staging.

    Methods: Twenty-seven consecutive patients with biopsy-proven adenocarcinoma of the prostate underwent MRI on a 1.5T scanner with a surface phased-array coil prior radical prostatectomy. Read More

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