Prabhakar Rajiah
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View article: Photon counting detector CTA for prostate artery embolization pre-procedure planning and intra-procedural guidance
Photon counting detector CTA for prostate artery embolization pre-procedure planning and intra-procedural guidance Open
View article: Learned high resolution energy‐integrating detector CT angiography: Harnessing the power of ultra‐high‐resolution photon counting detector CT
Learned high resolution energy‐integrating detector CT angiography: Harnessing the power of ultra‐high‐resolution photon counting detector CT Open
Background Coronary computed tomography angiography (cCTA) is a widely used noninvasive diagnostic exam to assess patients for coronary artery disease (CAD). However, the spatial resolution of most CT scanners is limited due to the use of …
View article: Photon Counting Detector CTA for Prostate Artery Embolization Pre-Procedure Planning and Intra-Procedural Guidance: A Case Series
Photon Counting Detector CTA for Prostate Artery Embolization Pre-Procedure Planning and Intra-Procedural Guidance: A Case Series Open
Background: Prostate artery embolization (PAE) requires a careful understanding of pelvic arterial anatomy and identifying prostatic artery variants. Pre-procedure CTA and intra-procedural cone beam CT are traditional means of planning and…
View article: Simultaneous high‐pitch multi‐energy CT pulmonary angiography using a dual‐source photon‐counting‐detector CT: A phantom experiment
Simultaneous high‐pitch multi‐energy CT pulmonary angiography using a dual‐source photon‐counting‐detector CT: A phantom experiment Open
Purpose A dual‐source CT system can be operated in a high‐pitch helical mode to provide a temporal resolution of 66 ms, which reduces motion artifacts in CT pulmonary angiography (CTPA). It can also be operated in a multi‐energy (ME) mode …
View article: Safety Net Reconstruction to Catch Low-Density and Low-Volume Calcifications at Photon-Counting Detector CT Using Virtual Noncontrast Imaging
Safety Net Reconstruction to Catch Low-Density and Low-Volume Calcifications at Photon-Counting Detector CT Using Virtual Noncontrast Imaging Open
View article: Corrigendum to “Coronary artery stenosis quantification in patients with dense calcifications using ultra-high-resolution photon-counting-detector computed tomography” [J Cardiovasc Comput Tomogr 18 (2024) 56–61]
Corrigendum to “Coronary artery stenosis quantification in patients with dense calcifications using ultra-high-resolution photon-counting-detector computed tomography” [J Cardiovasc Comput Tomogr 18 (2024) 56–61] Open
View article: Predicting postoperative systolic dysfunction in mitral regurgitation: CT vs. echocardiography
Predicting postoperative systolic dysfunction in mitral regurgitation: CT vs. echocardiography Open
Introduction Volume overload from mitral regurgitation can result in left ventricular systolic dysfunction. To prevent this, it is essential to operate before irreversible dysfunction occurs, but the optimal timing of intervention remains …
View article: Feasibility study of using low-kilovoltage, prospective gating, high-pitch, dual-source computed tomography prior to transcatheter aortic valve replacement: analysis of image quality and radiation dose
Feasibility study of using low-kilovoltage, prospective gating, high-pitch, dual-source computed tomography prior to transcatheter aortic valve replacement: analysis of image quality and radiation dose Open
Using low-kilovoltage, high-pitch DSCT can provide comparable image quality for TAVR evaluation and significantly reduce the radiation dose.
View article: Mitral Annular Disjunction: Review of an Increasingly Recognized Mitral Valve Entity
Mitral Annular Disjunction: Review of an Increasingly Recognized Mitral Valve Entity Open
Mitral annular disjunction (MAD) refers to atrial displacement of the hinge point of the mitral valve annulus from the ventricular myocardium. MAD leads to paradoxical expansion of the annulus in systole and may often be associated with mi…
View article: Comparison of Photon-counting Detector and Energy-integrating Detector CT for Visual Estimation of Coronary Percent Luminal Stenosis
Comparison of Photon-counting Detector and Energy-integrating Detector CT for Visual Estimation of Coronary Percent Luminal Stenosis Open
Background Compared with energy-integrating detector (EID) CT, the improved resolution of photon-counting detector (PCD) CT coupled with high-energy virtual monoenergetic images (VMIs) has been shown to decrease calcium blooming on images …
View article: Coronary artery stenosis quantification in patients with dense calcifications using ultra-high-resolution photon-counting-detector computed tomography
Coronary artery stenosis quantification in patients with dense calcifications using ultra-high-resolution photon-counting-detector computed tomography Open
View article: Milestones in CT: Past, Present, and Future
Milestones in CT: Past, Present, and Future Open
In 1971, the first patient CT examination by Ambrose and Hounsfield paved the way for not only volumetric imaging of the brain but of the entire body. From the initial 5-minute scan for a 180° rotation to today's 0.24-second scan for a 360…
View article: Potential benefits of photon counting detector computed tomography in pediatric imaging
Potential benefits of photon counting detector computed tomography in pediatric imaging Open
Photon counting detector (PCD) CT represents the newest advance in CT technology, with improved radiation dose efficiency, increased spatial resolution, inherent spectral imaging capabilities, and the ability to eliminate electronic noise.…
View article: Detection of Low Blood Hemoglobin Levels on Pulmonary CT Angiography: A Feasibility Study Combining Dual-Energy CT and Machine Learning
Detection of Low Blood Hemoglobin Levels on Pulmonary CT Angiography: A Feasibility Study Combining Dual-Energy CT and Machine Learning Open
Objectives: To evaluate if dual-energy CT (DECT) pulmonary angiography (CTPA) can detect anemia with the aid of machine learning. Methods: Inclusion of 100 patients (mean age ± SD, 51.3 ± 14.8 years; male-to-female ratio, 42/58) who underw…
View article: Opportunistic screening at chest computed tomography: literature review of cardiovascular significance of incidental findings
Opportunistic screening at chest computed tomography: literature review of cardiovascular significance of incidental findings Open
The radiologist interpreting a routine chest CT should be cognizant of the incidental cardiovascular findings, which helps in the diagnosis and risk-stratification of cardiovascular disease. This will guide appropriate referral and managem…
View article: Classification of high-risk coronary plaques using radiomic analysis of multi-energy photon-counting-detector computed tomography (PCD-CT) images
Classification of high-risk coronary plaques using radiomic analysis of multi-energy photon-counting-detector computed tomography (PCD-CT) images Open
Coronary plaque risk classification in images acquired with photon-counting-detector (PCD) CT was performed using a radiomics-based machine learning (ML) model. With IRB approval, 19 coronary CTA patients were scanned on a PCD-CT (NAEOTOM …
View article: Clinical applications of photon counting detector CT
Clinical applications of photon counting detector CT Open
View article: High-Pitch Multienergy Coronary CT Angiography in Dual-Source Photon-Counting Detector CT Scanner at Low Iodinated Contrast Dose
High-Pitch Multienergy Coronary CT Angiography in Dual-Source Photon-Counting Detector CT Scanner at Low Iodinated Contrast Dose Open
Objectives The aim of this study was to evaluate the high-helical pitch, multienergy (ME) scanning mode of a clinical dual-source photon-counting detector (PCD) computed tomography (CT) and the benefit of virtual monoenergetic images (VMIs…
View article: Optimal Virtual Monoenergetic Photon Energy (keV) for Photon-Counting-Detector Computed Tomography Angiography
Optimal Virtual Monoenergetic Photon Energy (keV) for Photon-Counting-Detector Computed Tomography Angiography Open
Objective This study aimed to determine the optimal photon energy for virtual monoenergetic images (VMI) in computed tomography angiography (CTA) using photon-counting-detector (PCD) CT. Methods Under institutional review board approval, 1…
View article: Multimodality imaging evaluation of arteriovenous fistulas and grafts: a clinical practice review
Multimodality imaging evaluation of arteriovenous fistulas and grafts: a clinical practice review Open
Arteriovenous fistulas (AVFs) and grafts (AVGs) are the preferred forms of vascular access for hemodialysis in patients with severe renal dysfunction. Multimodality imaging plays an important role in the pre-procedural evaluation of these …
View article: “Uncomplicated” Type B Aortic Dissection: It’s Complicated
“Uncomplicated” Type B Aortic Dissection: It’s Complicated Open
View article: High‐pitch, high temporal resolution, multi‐energy cardiac imaging on a dual‐source photon‐counting‐detector CT
High‐pitch, high temporal resolution, multi‐energy cardiac imaging on a dual‐source photon‐counting‐detector CT Open
Objective To measure the accuracy of material decomposition using a dual‐source photon‐counting‐detector (DS‐PCD) CT operated in the high‐pitch helical scanning mode and compare the results against dual‐source energy‐integrating‐detector (…
View article: Myocarditis Mimicking Stress-Induced (Takotsubo) Cardiomyopathy
Myocarditis Mimicking Stress-Induced (Takotsubo) Cardiomyopathy Open
A 27-year-old man with transfusion-dependent aplastic anemia was admitted with septic shock. A new-onset diffuse ST-segment elevation on electrocardiogram (ECG) and an up-trending high-sensitivity troponin T level, with a peak of 10,050 ng…
View article: Contents
Contents Open
View article: Optimizing low contrast volume thoracic CT angiography: From the basics to the advanced
Optimizing low contrast volume thoracic CT angiography: From the basics to the advanced Open
Contrast-enhanced CT angiography (CTA) is a widely used, noninvasive imaging technique for evaluating cardiovascular structures. Contrast-induced nephrotoxicity is a concern in renal disease; however, the true nephrotoxic potential of iodi…
View article: Myocardial Strain Evaluation with Cardiovascular MRI: Physics, Principles, and Clinical Applications
Myocardial Strain Evaluation with Cardiovascular MRI: Physics, Principles, and Clinical Applications Open
Myocardial strain is a measure of myocardial deformation, which is a more sensitive imaging biomarker of myocardial disease than the commonly used ventricular ejection fraction. Although myocardial strain is commonly evaluated by using spe…
View article: Photon-Counting Detector CT: Key Points Radiologists Should Know
Photon-Counting Detector CT: Key Points Radiologists Should Know Open
Photon-counting detector (PCD) CT is a new CT technology utilizing a direct conversion X-ray detector, where incident X-ray photon energies are directly recorded as electronical signals. The design of the photon-counting detector itself fa…
View article: First Clinical Photon-counting Detector CT System: Technical Evaluation
First Clinical Photon-counting Detector CT System: Technical Evaluation Open
Background The first clinical CT system to use photon-counting detector (PCD) technology has become available for patient care. Purpose To assess the technical performance of the PCD CT system with use of phantoms and representative partic…
View article: Cardiac MRI for Left Ventricular Dyssynchrony: Time for Coordinated Response
Cardiac MRI for Left Ventricular Dyssynchrony: Time for Coordinated Response Open
View article: A Novel Nodule Edge Sharpness Radiomic Biomarker Improves Performance of Lung-RADS for Distinguishing Adenocarcinomas from Granulomas on Non-Contrast CT Scans
A Novel Nodule Edge Sharpness Radiomic Biomarker Improves Performance of Lung-RADS for Distinguishing Adenocarcinomas from Granulomas on Non-Contrast CT Scans Open
The aim of this study is to evaluate whether NIS radiomics can distinguish lung adenocarcinomas from granulomas on non-contrast CT scans, and also to improve the performance of Lung-RADS by reclassifying benign nodules that were initially …