3,147 results match your criteria Abdominal Imaging[Journal]


How the radiologist can add value in the evaluation of the pre- and post-surgical pancreas.

Abdom Imaging 2015 Oct;40(8):2932-44

Disease involving the pancreas can be a significant diagnostic challenge to the interpreting radiologist. Moreover, the majority of disease processes involving the pancreas carry high significant morbidity and mortality either due to their natural process or related to their treatment options. As such, it is critical for radiologists to not only provide accurate information from imaging to guide patient management, but also deliver that information in a clear manner so as to aid the referring physician. Read More

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October 2015

Erratum to: Hot spleen: hypervascular lesions of the spleen.

Abdom Imaging 2015 Oct;40(8):3367

Department of Radiology, Anderson Cancer Center, University of Texas, Houston, TX, USA.

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October 2015

Cross-sectional imaging, with surgical correlation, of patients presenting with complications after remote bariatric surgery without bowel obstruction.

Abdom Imaging 2015 Oct;40(8):2945-65

Both restrictive and malabsorptive types of bariatric surgery may be associated with short- and long-term complications. The lack of small bowel obstruction is not necessarily indicative of a normal study, as a variety of non-obstructed complications exist. These include stenosis at the gastrojejunostomy, leaks, abscesses, hemorrhage, internal hernias, and gastric band erosions. Read More

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October 2015

The ability of 18F-choline PET/CT to identify local recurrence of prostate cancer.

Abdom Imaging 2015 Oct;40(8):3230-7

Nuclear Medicine Unit, IRCCS National Cancer Institute (CRO), Aviano, PN, Italy.

Purpose: To determine when 18F-choline PET/CT can truly identify local recurrence of prostate cancer.

Methods: 1031 patients from 3 European centers underwent (18)F-choline PET/CT (FCH PET/CT) for recurrent disease; 131 subjects (12.7%) showed a positive FCH uptake in the prostatic gland or prostatic fossa. Read More

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October 2015

T1-hyperintense renal lesions: can high signal predict lack of enhancement?

Abdom Imaging 2015 Oct;40(8):3175-81

Department of Radiology, Montefiore Medical Center, 111 E. 210th St., Bronx, NY, 10467, USA.

Objective: To establish highly specific criteria for predicting non-enhancement in T1-hyperintense non-fat-containing (T1-high) renal lesions using unenhanced fat-suppressed T1-weighted (T1-FS) images.

Materials And Methods: This IRB-approved, HIPAA-compliant, retrospective study included T1-high renal lesions found between 7/1/2012 and 7/1/2014. The largest lesion diameter and heterogeneity, mean signal intensity of lesion, and adjacent renal cortex were recorded from T1-FS images. Read More

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October 2015

Hot spleen: hypervascular lesions of the spleen.

Abdom Imaging 2015 Oct;40(7):2796-813

Department of Radiology, Anderson Cancer Center, University of Texas, Houston, TX, USA.

The differential diagnosis of splenic masses is broad and often hinges on the enhancement characteristics of the lesions. Most radiologists are familiar with the differential diagnosis of hypovascular lesions such as fungal infections, sarcoidosis/granulomatous disease, infarctions, and cysts. However, to our knowledge, there is no review article that presents the specific multimodality imaging features of vascular splenic lesions as a group. Read More

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October 2015

Performance of tumor growth kinetics as an imaging biomarker for response assessment in colorectal liver metastases: correlation with FDG PET.

Abdom Imaging 2015 Oct;40(8):3043-51

Department of Radiology, Northwestern Memorial Hospital, Northwestern University-Feinberg School of Medicine, 676 North Saint Clair Street Suite 800, Chicago, IL, 60611, USA.

Purpose: To correlate RECIST, volumetric criteria, and tumor growth kinetics at multidetector-computed tomography with tumor metabolic activity at FDG PET in colorectal liver metastases (CRCLM) treated with bevacizumab-based chemotherapy.

Methods: Thirty-two CRCLM in 20 patients treated with bevacizumab-based chemotherapy were evaluated. Pre- and post-treatment CT scans were used to calculate reciprocal of doubling time (RDT), percentage change in the lesion's longest transaxial diameter (RECIST 1. Read More

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October 2015

Assessing the clinical utility of color Doppler ultrasound for ovarian torsion in the setting of a negative contrast-enhanced CT scan of the abdomen and pelvis.

Abdom Imaging 2015 Oct;40(8):3206-13

Department of Radiological Sciences, University of California, Irvine, 101 The City Drive South, Orange, CA, 92697, USA.

Purpose: The purpose of this study is to evaluate the utility of color Doppler ultrasound (CDU) in the assessment of ovarian torsion following a negative contrast-enhanced computed tomography (CT) examination.

Methods: This is a retrospective study of women who presented to the ED with abdominal pain and received both a contrast-enhanced CT and CDU within a 24-h period. The abdominal/pelvic CT examinations were evaluated for findings specific to torsion, including ovarian size greater than 5 cm, the presence of free fluid, uterine deviation, fallopian tube thickening, ovarian fat stranding, smooth wall thickening, the presence of the "twisted pedicle" sign, and abnormal ovarian enhancement. Read More

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October 2015

Diagnostic performance of imaging criteria for distinguishing autoimmune cholangiopathy from primary sclerosing cholangitis and bile duct malignancy.

Abdom Imaging 2015 Oct;40(8):3052-61

Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC, USA.

Objective: To determine the diagnostic performance of imaging criteria for distinguishing Ig-G4-associated autoimmune cholangiopathy (IAC) from primary sclerosing cholangitis (PSC) and bile duct malignancy.

Methods: A medical records search between January 2008 and October 2013 identified 10 patients (8 M, 2 F, mean age 61 years, range 34-82) with a clinical diagnosis of IAC. Fifteen cases of PSC (6 M, 9 F, mean age 50, range 22-65) and 15 cases of biliary malignancy (7 M, 8 F, mean age 65, range 48-84) were randomly selected for comparative analysis. Read More

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October 2015

Medicare cost of colorectal cancer screening: CT colonography vs. optical colonoscopy.

Abdom Imaging 2015 Oct;40(8):2966-76

Milliman, One Pennsylvania Plaza, 38th Floor, New York, NY, 10019, USA.

Purpose: To compare the Medicare population cost of colorectal cancer (CRC) screening of average risk individuals by CT colonography (CTC) vs. optical colonoscopy (OC).

Methods: The authors used Medicare claims data, fee schedules, established protocols, and other sources to estimate CTC and OC per-screen costs, including the costs of OC referrals for a subset of CTC patients. Read More

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October 2015

Standardized uptake value on positron emission tomography/computed tomography predicts prognosis in patients with locally advanced pancreatic cancer.

Abdom Imaging 2015 Oct;40(8):3117-21

Department of Medical Oncology, Shengjing Hospital of China Medical University, 36 Sanhao Road, Shenyang, 110004, China.

Background: The aim of the present study was to investigate the use and value of maximum standardized uptake value (SUV max) on positron emission tomography/computed tomography (PET/CT) images as a prognostic marker for patients with locally advanced pancreatic cancer (LAPC).

Materials And Methods: The medical records of all consecutive patients who underwent PET/CT examination in our institution were retrospectively reviewed. Inclusion criteria were histologically or cytologically proven LAPC. Read More

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October 2015

Diffusion-weighted whole-body imaging with background body signal suppression/T2 image fusion and positron emission tomography/computed tomography of upper gastrointestinal cancers.

Abdom Imaging 2015 Oct;40(8):3012-9

Department of Neurosurgery, National Hospital Organization Shimoshizu Hospital, 934-5 Shikawatashi, Yotsukaido City, Chiba, 284-0003, Japan.

Purpose: Diffusion-weighted whole-body imaging with background body signal suppression/T2 image fusion (DWIBS/T2) strongly contrasts cancerous tissue against background healthy tissues. Positron emission tomography/computed tomography (PET/CT) applies the uptake of 18-fluorodeoxyglucose in the diagnosis of cancer. Our aim was to compare DWIBS/T2 and PET/CT in patients with upper gastrointestinal cancers. Read More

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October 2015

Intra- and inter-examination repeatability of magnetic resonance spectroscopy, magnitude-based MRI, and complex-based MRI for estimation of hepatic proton density fat fraction in overweight and obese children and adults.

Abdom Imaging 2015 Oct;40(8):3070-7

Liver Imaging Group, MR3T Bydder Laboratory, Department of Radiology, University of California at San Diego, 408 Dickinson Street MC 8226, San Diego, CA, 92103-8226, USA.

Purpose: Determine intra- and inter-examination repeatability of magnitude-based magnetic resonance imaging (MRI-M), complex-based magnetic resonance imaging (MRI-C), and magnetic resonance spectroscopy (MRS) at 3T for estimating hepatic proton density fat fraction (PDFF), and using MRS as a reference, confirm MRI-M and MRI-C accuracy.

Methods: Twenty-nine overweight and obese pediatric (n = 20) and adult (n = 9) subjects (23 male, 6 female) underwent three same-day 3T MR examinations. In each examination MRI-M, MRI-C, and single-voxel MRS were acquired three times. Read More

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October 2015

MRI: first-line imaging modality for pregnant patients with suspected appendicitis.

Abdom Imaging 2015 Oct;40(8):3359-64

Department of Diagnostic Imaging, Rhode Island Hospital, Brown University, 593 Eddy Street, Providence, RI, 02903, USA.

Purpose: The purpose of our study was to evaluate the sensitivity, specificity, and accuracy of ultrasound (US) as compared to magnetic resonance imaging (MRI) in pregnant patients with suspected appendicitis for visualization of the appendix, accuracy at diagnosing acute appendicitis, the ability of each modality to identify alternate diagnoses of pain and whether gestational age (GA) has an association with appendix identification rates.

Methods: We retrospectively reviewed the records of 140 pregnant patients with suspected appendicitis to determine the efficacy of US and MRI to identify the appendix, diagnose or exclude acute appendicitis, identify alternative etiologies for clinical presentation, and the affect of GA on identification of the appendix. Imaging results were correlated with surgical pathology in patients who underwent surgery. Read More

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October 2015

Commentary on confounding definitions and descriptions of body packing.

Abdom Imaging 2015 Oct;40(8):3365-6

Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza - University of Rome, Rome, Italy.

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October 2015

The role of CT-guided percutaneous drainage of loculated air collections: an institutional experience.

Abdom Imaging 2015 Oct;40(8):3257-64

Division of Abdominal Imaging, Department of Radiology, Duke University Medical Center, DUMC 3808, Durham, NC, 27710, USA.

Objective: The purpose of this study is to describe our experience with the role of CT-guided percutaneous drainage of loculated intra-abdominal collections consisting entirely of gas.

Materials And Methods: An IRB-approved retrospective study analyzing patients with air-only intra-abdominal collections over an 8-year period was undertaken. Seven patients referred for percutaneous drainage were included. Read More

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October 2015

MR features of small hepatocellular carcinoma in normal, fibrotic, and cirrhotic livers: a comparative study.

Abdom Imaging 2015 Oct;40(8):3062-9

Department of Radiology, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, Xuhui District, 200032, Shanghai, China.

Purpose: The objective of this study is to compare MR imaging features of small hepatocellular carcinoma (HCC) (≤ 2 cm) in normal, fibrotic, and cirrhotic liver.

Methods: A total of 215 patients with 235 pathologically proven sHCC were retrospectively analyzed. Patients were classified into three groups according to the patients' liver condition: patients with normal liver (F0, group 1), fibrosis without cirrhosis (F1-3, group 2), and cirrhosis (F4, group 3). Read More

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October 2015

Imaging of hepatobiliary involvement in sarcoidosis.

Abdom Imaging 2015 Oct;40(8):3330-7

Department of Radiology, Hacettepe University, School of Medicine, 06100, Ankara, Turkey.

Sarcoidosis is mainly a disease of the respiratory system; however, several other organ systems may be affected in the course of the disease. Liver is one of the most frequently affected organs in the setting of sarcoidosis after lungs and lymph nodes. Microscopic hepatic involvement is common in these patients but is mostly clinically silent. Read More

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October 2015

Motion artifacts in kidney stone imaging using single-source and dual-source dual-energy CT scanners: a phantom study.

Abdom Imaging 2015 Oct;40(8):3161-7

Mayo Clinic, 4500 San Pablo Rd, Jacksonville, FL, 32224, USA.

Purpose: Dual-energy computed tomography (DECT) has shown the capability of differentiating uric acid (UA) from non-UA stones with 90-100% accuracy. With the invention of dual-source (DS) scanners, both low- and high-energy images are acquired simultaneously. However, DECT can also be performed by sequential acquisition of both images on single-source (SS) scanners. Read More

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October 2015

MDCT and MRI of the ampulla of Vater. Part II: non-epithelial neoplasms, benign ampullary disorders, and pitfalls.

Abdom Imaging 2015 Oct;40(8):3292-312

Division of Body MRI, Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA.

The purpose of this two-part article is to review the cross-sectional imaging features of benign and malignant ampullary conditions with endoscopic and histopathologic correlation and to present the most common pitfalls in the evaluation of the ampulla. In this part, we will review the mesenchymal and secondary neoplasms of the ampulla, a vast array of benign ampullary conditions, causes of bulging papilla, and pitfalls. Familiarity with ampullary pathologic conditions and pitfalls, as well as the use of optimized MDCT and MRI techniques, may improve the diagnostic accuracy of radiologists facing ampullary abnormalities. Read More

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October 2015

MDCT and MRI of the ampulla of Vater. Part I: technique optimization, normal anatomy, and epithelial neoplasms.

Abdom Imaging 2015 Oct;40(8):3274-91

Division of Body MRI, Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA.

The purpose of this two-part article is to review the cross-sectional anatomy of the ampulla and periampullary region, to propose novel and optimized MDCT and MRI techniques that allow accurate evaluation of the ampulla of Vater, and to summarize the cross-sectional imaging features of benign and malignant ampullary conditions. In this first part, we will review the normal anatomy of the ampullary region, provide suggestions on how to optimize evaluation of the ampullary region by MDCT and MRI, and review the imaging features of select epithelial neoplasms of the ampulla. Familiarity with the normal ampullary anatomy and the pathologic conditions involving the ampulla, as well as the use of optimized MDCT and MRI techniques, may improve the diagnostic accuracy of radiologists facing ampullary abnormalities. Read More

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October 2015

Endoscopic retrograde cholangiopancreatography in patients with surgically altered gastrointestinal anatomy.

Abdom Imaging 2015 Oct;40(8):2921-31

Division of Gastroenterology and Hepatology, Mayo Clinic, Phoenix, AZ, USA.

Endoscopic retrograde cholangiopancreatography (ERCP) in patients with surgically altered upper gastrointestinal anatomy, such as Roux-en-Y gastric bypass (RYGB), can be more challenging compared to those with a normal anatomy. Detailed assessment of cross-sectional imaging features by the radiologist, especially the pancreaticobiliary anatomy, strictures, and stones, is very helpful to the endoscopist in planning the procedure. In addition, any information on enteral anastomoses (for e. Read More

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October 2015

CT prediction of the Fuhrman grade of clear cell renal cell carcinoma (RCC): towards the development of computer-assisted diagnostic method.

Abdom Imaging 2015 Oct;40(8):3168-74

Department of Radiology, University of Southern California, 1500 San Pablo St, 2nd floor imaging, Los Angeles, CA, 90033, USA.

Purpose: There are distinct quantifiable features characterizing renal cell carcinomas on contrast-enhanced CT examinations, such as peak tumor enhancement, tumor heterogeneity, and percent contrast washout. While qualitative visual impressions often suffice for diagnosis, quantitative metrics if developed and validated can add to the information available from standard of care diagnostic imaging. The purpose of this study is to assess the use of quantitative enhancement metrics in predicting the Fuhrman grade of clear cell RCC. Read More

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October 2015

Differentiation of deep venous thrombosis from femoral vein mixing artifact on routine abdominopelvic CT.

Abdom Imaging 2015 Oct;40(8):3191-5

Department of Radiology, NYU School of Medicine, NYU Langone Medical Center, 550 First Avenue, New York, NY, 10016, USA.

Purpose: The objective of this study is to assess the performance of qualitative and quantitative imaging features for the differentiation of deep venous thrombosis (DVT) from mixing artifact on routine portal venous phase abdominopelvic CT.

Methods: This retrospective study included 40 adult patients with a femoral vein filling defect on portal venous phase CT and a Duplex ultrasound (n = 36) or catheter venogram (n = 4) to confirm presence or absence of DVT. Two radiologists (R1, R2) assessed the femoral veins for various qualitative and quantitative features. Read More

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October 2015

Predictive models for lymph node metastases in patients with testicular germ cell tumors.

Abdom Imaging 2015 Oct;40(8):3196-205

Division of Abdominal Imaging and Intervention, Massachusetts General Hospital-Harvard Medical School, 55 Fruit St, Boston, MA, 02114, USA.

Purpose: To develop predictive models for lymph node (LN) metastasis in testicular germ cell tumors.

Materials And Methods: 291 patients with testicular germ cell tumors were included, which were divided into seminomatous and nonseminomatous groups. For screening the risk factors for LN metastasis, the tumor-related characteristics (including histopathological information and tumor markers) alpha fetoprotein and the lymph node-related features on CT were compared between metastatic cases and nonmetastatic cases. Read More

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October 2015

Accurate estimate of pancreatic T2* values: how to deal with fat infiltration.

Abdom Imaging 2015 Oct;40(8):3129-36

CMR Unit, Fondazione G. Monasterio CNR-Regione Toscana, Area della Ricerca S. Cataldo, Via Moruzzi, 1, 56124, Pisa, Italy.

Purpose: We examined different approaches aimed to deal with the signal fluctuation of pancreatic T2* values due to fat infiltration in order to obtain accurate estimates of iron overload.

Methods: Pancreatic T2* values were assessed in 20 patients (13 females, 37.24 ± 9. Read More

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October 2015

Spectrum of IgG4-related disease on multi-detector CT: a 5-year study of a single medical center data.

Abdom Imaging 2015 Oct;40(8):3104-16

Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Shuai Fu Yuan #1, Dongcheng Dist., Beijing, 100730, People's Republic of China.

Purpose: To discuss the diverse imaging features of pancreatic and extra-pancreatic lesions of IgG4-related disease (IgG4-RD) on multi-detector CT (MDCT).

Methods: This retrospective study was approved by our institutional research ethics board, and informed consent was waived. From 2008 to 2013, 159 patients including 120 men (mean age 57 years; range 27-79 years) and 39 women (mean age 51 years; range 25-83 years) who met the comprehensive diagnostic criteria for IgG4-RD (2011) were enrolled. Read More

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October 2015

Midterm results of percutaneous microwave ablation under ultrasound guidance versus retroperitoneal laparoscopic radial nephrectomy for small renal cell carcinoma.

Abdom Imaging 2015 Oct;40(8):3248-56

Department of Interventional Ultrasound, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.

Laparoscopic radial nephrectomy (LRN) and microwave ablation (MWA) are optional treatment for renal cell carcinoma (RCC). However, the comparative study with two techniques remains lacking. The aim of this study was to evaluate midterm results of MWA vs. Read More

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October 2015

Pancreatic neuroendocrine tumors: correlation between histogram analysis of apparent diffusion coefficient maps and tumor grade.

Abdom Imaging 2015 Oct;40(8):3122-8

Department of Radiology, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium.

Purpose: To explore the role of histogram analysis of apparent diffusion coefficient (ADC) MRI maps based on entire tumor volume data in determining pancreatic neuroendocrine tumor (PNT) grade.

Methods And Materials: Retrospective evaluation of 22 patients with PNTs included low-grade (G1; n = 15), intermediate-grade (G2; n = 4), and high-grade (G3; n = 3) tumors. Regions of interest containing the lesion were drawn on every section of the ADC map containing the tumor and summated to obtain histograms for entire tumor volume. Read More

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October 2015

CT of gastro-duodenal obstruction.

Abdom Imaging 2015 Oct;40(8):3265-73

Imaging Department, Lapeyronie Hospital CHU Montpellier, Montpellier, France.

Gastro-duodenal obstruction encompasses a spectrum of benign and malignant disease. Historically, chronic peptic ulcer disease was the main cause of gastro-duodenal obstruction, whereas now malignant cause with gastric carcinomas for gastric obstruction and pancreatic tumors for duodenal obstruction predominate. This paper reviews the role of CT in diagnosing gastro-duodenal obstruction, its level, its cause by identifying intraluminal, parietal, or extrinsic process, and the presence of complication. Read More

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October 2015