Research Publications

Emergency Radiology Coverage: Technical and Clinical Feasibility of an International Teleradiology Model

Emergency Radiology (2003)

The purpose of the study was to determine the feasibility of international teleradiology, utilizing day-night time differences, for online interpretation of overnight computed tomography (CT) studies. One hundred and two consecutive Emergency Room patients who underwent CT examinations between the hours of 11 pm and 7 am were enrolled. All age groups and study types were included. CT studies were transmitted from the in-hospital PACS system (Kodak, Fremont, Calif.) to a web-based server (Medweb, San Francisco, Calif.). A radiologist in Bangalore, India, working an 8 am to 4 pm day shift, downloaded and reviewed the studies on a desktop PC using a 128-kbps internet connection at 10-20:1 wavelet compression and generated a report. The report was then uploaded to the server, noting the time at upload. Each study report was compared with the official in-house diagnostic report and concordance assessed on a three-point scale. Mean download time was 8.14 s per image. For head CT reports ( n=47), the mean turnaround time for a final transcribed report was 39.5 min. For abdomen/pelvis CT reports ( n=48) the mean turnaround time was 84.4 min. Out of 106 cases, there was discordance between the clinical diagnostic report and the study report in 20 (19%); however, on subsequent review the teleradiology report was found to be correct in 13 of these. Day-night time differences across the globe can be utilized to provide overnight emergency radiology coverage using web-based teleradiology. Scan download and report upload times are within acceptable limits. To read more, click on below link…

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Renal Medulla Carcinoma in a White Adolescent

American journal of Roentgenology (1997)

Renal medullary carcinoma (RMC) is a rare neoplasm of the kidney that has been recently described. It is almost exclusive to young patients of African descent and associated with sickle cell hemoglobinopathy, mainly sickle cell trait and hemoglobin sickle cell disease. The prognosis of RMC is very poor because of the highly aggressive behavior of this neoplasm and its resistance to conventional chemotherapy. Metastatic disease is almost universal at the time of presentation, and the malignancy is minimally responsive to a variety of regimens and/or modalities, including surgery, radiotherapy, chemotherapy, and biological immune-modulation therapy. We report the seventh case of a left RMC occurring in a white child with sickle cell trait, but with a localization of the tumor in the left kidney, considered a non-predominant side for this type of tumor. To learn more, click the below link.

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Dental Implants and Dental CT Software Programs

Seminars in Ultrasound, CT and MRI (1995)

Dental implants are titanium cylinders that are surgically implanted into the jaw to allow fixation of a permanent dental prosthesis. These have provided an attractive alternative to standard removable dentures and have become quite popular. To assess these patients preoperatively, CT software programs were developed that display multiple axial, cross-sectional, and panoramic images of the jaw. As a result, new dialogues and interactions were created between radiologists and dentists, and this in turn brought new territories and unfamiliar diseases to the radiologists’ view. The purpose of this article is to familiarize the radiologist with dental implants, the surgical procedure, dental CT software programs, and related dental pathology. To know more, do read.

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Kommerell’s Diverticulum and Stenosis of an Aberrant Left Subclavian Artery

Abstract Left aortic arch with an aberrant right subclavian artery is the most common anomaly of the aortic arch. Other rare anomalies include the occurrence of a right aortic arch with an aberrant left subclavian artery that has a diverticulum at its site of origin, known as Kommerell’s diverticulum. Right-sided aortic arch with an aberrant

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Giant aneurysm of aortopulmonary collateral.

Introduction We present an unusual case of a giant aneurysm of an aortopulmonary collateral, in a patient of Tetralogy of Fallot with pulmonary atresia on long-term conservative treatment. Aneurysm of aortopulmonary collateral is an extremely rare finding. Only a few similar cases have been reported in literature. Link for the publication: https://www.thieme-connect.com/products/ejournals/pdf/10.4103/0971-3026.32702.pdf To view or

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Contrast Material Extravasation:Appearances on Helical Computed Tomography

Abstract Contrast material extravasation on a computed tomography image invariably indicates disruption ofvascular structures, bowel, or the urinary tract. The pattern of contrast material extravasation often allowsexact anatomic localisation of the site of haemorrhage or perforation and contributes to effective intervention.In this pictorial essay, the helical computed tomography appearances of contrast material extravasation arehighlighted with

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Magnetic resonance imaging diagnosis of Mayer-Rokitansky-Kuster-Hauser syndrome

Abstract Magnetic resonance imaging (MRI) is the mainstay in the imaging evaluation of Mullerian agenesis, but is not routinely being utilized, particularly in India. Though sagittal MRI clearly demonstrates the absence or hypoplasia of the uterus and the axial images demonstrate the normal ovaries, it is the ability to identify and objectively evaluate other associated

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Multi- attribute Non-initializing Texture Reconstruction based ASM (MANTRA)

Abstract In this paper we present MANTRA (Multi-Attribute, Non-Initializing, Texture Reconstruction Based Active Shape Model) which incorporates a number of features that improve on the the popular Active Shape Model (ASM) algorithm. MANTRA has the following advantages over the traditional ASM model. (1) It does not rely on image intensity information alone, as it incorporates

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