Publications by authors named "Mohammad Hashmi"

10 Publications

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LARNet: Real-Time Detection of Facial Micro Expression Using Lossless Attention Residual Network.

Sensors (Basel) 2021 Feb 5;21(4). Epub 2021 Feb 5.

Department of Energy IT, Gachon University, Seongnam 13120, Korea.

Facial micro expressions are brief, spontaneous, and crucial emotions deep inside the mind, reflecting the actual thoughts for that moment. Humans can cover their emotions on a large scale, but their actual intentions and emotions can be extracted at a micro-level. Micro expressions are organic when compared with macro expressions, posing a challenge to both humans, as well as machines, to identify. In recent years, detection of facial expressions are widely used in commercial complexes, hotels, restaurants, psychology, security, offices, and education institutes. The aim and motivation of this paper are to provide an end-to-end architecture that accurately detects the actual expressions at the micro-scale features. However, the main research is to provide an analysis of the specific parts that are crucial for detecting the micro expressions from a face. Many states of the art approaches have been trained on the micro facial expressions and compared with our proposed Lossless Attention Residual Network (LARNet) approach. However, the main research on this is to provide analysis on the specific parts that are crucial for detecting the micro expressions from a face. Many CNN-based approaches extracts the features at local level which digs much deeper into the face pixels. However, the spatial and temporal information extracted from the face is encoded in LARNet for a feature fusion extraction on specific crucial locations, such as nose, cheeks, mouth, and eyes regions. LARNet outperforms the state-of-the-art methods with a slight margin by accurately detecting facial micro expressions in real-time. Lastly, the proposed LARNet becomes accurate and better by training with more annotated data.
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http://dx.doi.org/10.3390/s21041098DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7914525PMC
February 2021

Efficient Pneumonia Detection in Chest Xray Images Using Deep Transfer Learning.

Diagnostics (Basel) 2020 Jun 19;10(6). Epub 2020 Jun 19.

Department of Energy IT, Gachon University, Seongnam 13120, Korea.

Pneumonia causes the death of around 700,000 children every year and affects 7% of the global population. Chest X-rays are primarily used for the diagnosis of this disease. However, even for a trained radiologist, it is a challenging task to examine chest X-rays. There is a need to improve the diagnosis accuracy. In this work, an efficient model for the detection of pneumonia trained on digital chest X-ray images is proposed, which could aid the radiologists in their decision making process. A novel approach based on a weighted classifier is introduced, which combines the weighted predictions from the state-of-the-art deep learning models such as ResNet18, Xception, InceptionV3, DenseNet121, and MobileNetV3 in an optimal way. This approach is a supervised learning approach in which the network predicts the result based on the quality of the dataset used. Transfer learning is used to fine-tune the deep learning models to obtain higher training and validation accuracy. Partial data augmentation techniques are employed to increase the training dataset in a balanced way. The proposed weighted classifier is able to outperform all the individual models. Finally, the model is evaluated, not only in terms of test accuracy, but also in the AUC score. The final proposed weighted classifier model is able to achieve a test accuracy of 98.43% and an AUC score of 99.76 on the unseen data from the Guangzhou Women and Children's Medical Center pneumonia dataset. Hence, the proposed model can be used for a quick diagnosis of pneumonia and can aid the radiologists in the diagnosis process.
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http://dx.doi.org/10.3390/diagnostics10060417DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345724PMC
June 2020

Internal medicine residents' point-of-care ultrasound skills and need assessment and the role of medical school training.

Adv Med Educ Pract 2019 31;10:379-386. Epub 2019 May 31.

Department of Internal Medicine, UCSF Fresno Medical Education Program, Fresno, CA, USA.

Point-of-care-ultrasound (POCUS) as a useful bedside tool is growing. Few studies have examined residents' attitude towards POCUS or compared POCUS image interpretation skills between residents with and without POCUS training in medical school. We distributed an anonymous survey and image interpretation test to assess residents' attitude towards POCUS, confidence, and skills in interpreting POCUS images and videos. Using independent samples t-tests, we compared mean confidence levels and test scores between residents with and without prior POCUS training. Fifty-two residents responded to survey (response rate 68%) and 59 took the image interpretation test (77%). Most residents (90%) reported being interested in POCUS. Residents with prior POCUS training (n=13) were either PGY-1 (9) or PGY-2 (4). No PGY-3 resident had prior training. Most residents (83%) thought POCUS could be extremely useful in the inpatient setting compared to 29% for outpatient setting. PGY-1 residents with prior training had a higher mean confidence level than PGY-1 residents without prior training, but the difference was not statistically significant (3.26 vs 2.64; =0.08). PGY-1 with prior training had a mean confidence level that was close to that of PGY-3 residents. PGY-1 residents with prior training scored significantly higher than PGY-1 residents without prior training in image interpretation test (10.25 vs 7; =0.01). Residents felt most confident in interpreting inferior vena cava images (mean 3.7; max. 5), which also had the highest score in image interpretation test (correct response rate of 88%). Our residents seem very interested in POCUS. PGY-1 residents with prior POCUS training in medical school seem to have higher confidence in their POCUS skills than PGY-1 residents without prior training and outperformed them in image interpretation test. The study is very instructive in building our future POCUS curriculum for residents.
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http://dx.doi.org/10.2147/AMEP.S198536DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6549795PMC
May 2019

The arrowhead ministernotomy with rigid sternal plate fixation: a minimally invasive approach for surgery of the ascending aorta and aortic root.

Minim Invasive Surg 2014 18;2014:681371. Epub 2014 Nov 18.

Division of Cardiac Surgery, Rush University, Chicago, IL 60612, USA.

Background. Ministernotomy incisions have been increasingly used in a variety of settings. We describe a novel approach to ministernotomy using arrowhead incision and rigid sternal fixation with a standard sternal plating system. Methods. A small, midline, vertical incision is made from the midportion of the manubrium to a point just above the 4th intercostal mark. The sternum is opened in the shape of an inverted T using two oblique horizontal incisions from the midline to the sternal edges. At the time of chest closure, the three bony segments are aligned and approximated, and titanium plates (Sternalock, Jacksonville, Florida) are used to fix the body of the sternum back together. Results. This case series includes 11 patients who underwent arrowhead ministernotomy with rigid sternal plate fixation for aortic surgery. The procedures performed were axillary cannulation (n = 2), aortic root replacement (n = 3), valve sparing root replacement (n = 3), and replacement of the ascending aorta (n = 11) and/or hemiarch (n = 2). Thirty-day mortality was 0%; there were no conversions, strokes, or sternal wound infections. Conclusions. Arrowhead ministernotomy with rigid sternal plate fixation is an adequate minimally invasive approach for surgery of the ascending aorta and aortic root.
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http://dx.doi.org/10.1155/2014/681371DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4251070PMC
December 2014

Percutaneous transcatheter closure of the aortic valve to treat cardiogenic shock in a left ventricular assist device patient with severe aortic insufficiency.

Ann Thorac Surg 2012 Sep;94(3):985-8

Section of Cardiac and Thoracic Surgery, Department of Surgery, University of Chicago Medical Center, Chicago, Illinois 60637, USA.

In this case report, we present a patient status post left ventricular assist device implantation complicated by de novo aortic insufficiency. At 8 months postimplant, the patient underwent a reoperative aortic valve repair, without complete closure of the valve. Three months after reoperation, the patient developed cardiogenic shock secondary to recurrent, severe aortic insufficiency. Ultimately, the patient underwent percutaneous, transcatheter closure of the aortic valve with an Amplatzer Cribiform device (AGA Medical Corp, Plymouth, MN). Two months post procedure, the patient remains stable with improved symptoms and functional status, and without evidence of further aortic insufficiency or device migration.
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http://dx.doi.org/10.1016/j.athoracsur.2012.01.089DOI Listing
September 2012

Langerhans cell histiocytosis of long bones: MR imaging and complete follow up study.

J Cancer Res Ther 2012 Apr-Jun;8(2):286-8

EKO CT and MRI Scan Centre at Medical College and Hospitals, Campus 88-College Street, Kolkata, India.

Langerhans cell histiocytosis (LCH) is a relatively rare disease affecting the reticuloendothelial system in the pediatric age group. It can affect bones, lung, liver, spleen, lymph nodes and skin. MR imaging is particularly informative in diagnosis and management of bone LCH. In this report, we present the initial and 23 months post-treatment MR images of a femoral LCH lesion in a 12-year-old child to describe the role of MRI in bone LCH.
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http://dx.doi.org/10.4103/0973-1482.98991DOI Listing
December 2012

Rare magnetic resonance imaging findings in medium-chain acyl-coenzyme A dehydrogenase deficiency.

Pediatr Neurol 2011 Sep;45(3):203-5

Department of Pediatrics, Medical College and Hospital, Kolkata, West Bengal, India.

A 3-year-old boy receiving valproate for 1.5 months presented with sudden-onset unprovoked seizures and unconsciousness. Hypoketotic hypoglycemia, hyperammonemia, and deranged liver function were detected. Elevated medium-chain urinary acylglycines and plasma acylcarnitine were detected. His serum valproate level was elevated. Valproate toxicity had been precipitated in presence of medium-chain acyl-CoA dehydrogenase deficiency. Cranial magnetic resonance imaging brain indicated unilateral basal ganglia ischemia instead of the bilateral changes expected in metabolic disease.
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http://dx.doi.org/10.1016/j.pediatrneurol.2011.04.011DOI Listing
September 2011

Trigeminal Neuralgia in an HIV Patient.

J Glob Infect Dis 2010 Jan;2(1):65-6

EKO CT & MRI Scan Centre, Medical College and Hospitals Campus, Kolkata, India.

Trigeminal neuralgia is a painful condition affecting face. Its commonest cause is the tortuous vessels in prepontine cistern. There are other causes also, like brainstem lesions and mass lesions, as well as inflammatory causes. We present a case of an HIV patient with marked involvement of trigeminal nerves, which is a unique finding in immunocompromised patients.
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http://dx.doi.org/10.4103/0974-777X.59254DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2840973PMC
January 2010

Biliary ascariasis on magnetic resonance cholangiopancreatography.

J Glob Infect Dis 2009 Jul;1(2):144-5

EKO CT and MRI Scan Centre, At Medical College and Hospitals Campus, 88-College Street, Kolkata-700 073, India.

A 17-year-old girl presented with features of biliary obstruction. Magnetic resonance cholangi-pancreatography revealed typical linear signals in common bile duct, which appears like Ascaris lumbricoides. The diagnosis was confirmed by endoscopic removal of the worm.
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http://dx.doi.org/10.4103/0974-777X.56248DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2840951PMC
July 2009
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