Marc Kohli, MD

CT
How to comply with CMS's CT radiation dose measure
Inconsistency in CT radiation doses represents a modifiable health risk, and doses can be standardized through auditing and feedback to hospitals and physicians.
June 27, 2024
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(Left) F-18 GP1 PET/CT images from a 75-year-old woman show multiple blood clots in the deep veins of the left leg (from the thigh to the calf), as well as several clots in the right calf. Venous ultrasound confirms blood clots in left thigh, knee and calf veins. PET/CT also detects clots in both lungs, which are confirmed by contrast-enhanced CT image. (Right) 18F-GP1 PET/CT images from a 70-year-old woman show widespread blood clots throughout the body. In addition to clots in the deep veins of both legs and the arteries of both lungs (A), the scan also detected unexpected clots in several other areas, including blood vessels near the skull/head (B), spine (C), heart (D), and pelvis (E). Further evaluation revealed that the patient had antiphospholipid syndrome, an autoimmune condition that increases the risk of abnormal blood clot formation.
SNMMI 2026
SNMMI: PET tracer that detects deep vein thrombosis wins Image of the Year
F-18 GP1 is derived from elarofiban and selectively binds to glycoprotein IIb/IIIa receptors on activated platelets.
Static PET-CT image of patient with hypercortisolism taken at 60 minutes post-injection.
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SNMMI: Novel radiotracer effectively images overactive adrenal glands
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SNMMI: Mouaz Al-Mallah discusses cardiac PET
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ASCO: Proton therapy, IMRT both work well for prostate cancer
(a) Benchtop portable POC-PET prototype system. (b) Phantom imaging experiment setup. (c) Comparison of conventional full-data MLEM reconstruction with incremental OSEM reconstruction.
SNMMI 2026
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Adipose tissue measured on CT scans taken years before the COVID-19 pandemic predicted hospitalization and death from SARS-CoV-2.
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CT collateral status may predict outcomes in stroke patients
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The findings have implications for future research to determine which stroke patients with medium-vessel occlusion benefit from EVT.
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Exemplary cases from the ESCAPE-MeVO trial illustrating good, moderate, and poor collateral status at baseline multiphase CT angiography (CTA). (A) Sagittal image shows a left anterior middle cerebral artery medium-vessel occlusion (MeVO) with a calcified thrombus (arrow). (B–D) Axial images show the (B) arterial, (C) peak venous, and (D) delayed venous phases of the baseline multiphase CTA examination. The affected brain parenchyma is highlighted by the dashed outline. The collateral status is good, with early filling of more than 50% of the leptomeningeal collaterals compared with the contralateral side in the arterial phase (B), and there is no delayed washout in the peak venous (C) or delayed venous phase (D). (E) Sagittal image shows a left anterior middle cerebral artery MeVO (arrow). (F–H) Axial images show the (F) arterial, (G) peak venous, and (H) delayed venous phases of the baseline multiphase CTA examination. The affected brain parenchyma is highlighted by the dashed outline. The collateral status is moderate (more than 25% but less than 50% filling of the leptomeningeal collaterals in the affected territory compared with the contralateral side) on the arterial (F) and peak venous (G) phase, and there is delayed washout in the late venous phase (H). (I) Sagittal image shows a posterior dominant middle cerebral artery MeVO (arrow). (J–L) Axial images show the (J) arterial, (K) peak venous, and (L) delayed venous phases of the baseline multiphase CTA examination. The affected brain parenchyma is highlighted by the dashed outline. The collateral status is poor, with almost no collateral filling.
Despite pediatric ED imaging capability, race and insurance gaps remain
By Kate Madden Yee
More work is needed to ensure pediatric imaging in the ED addresses both quality and equity of care, according to investigators.
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GEHC, UW Medicine Radiology launch imaging collaboration
By AuntMinnie.com staff writers
GEHC and the UW Department of Radiology are collaborating to advance CT and molecular imaging technologies.
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Human-AI collaboration beats AI alone for identifying PE
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Study findings highlight the continued central role of radiologists for this indication.
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Case example of a false-negative AI result. An 85-year-old female presented to the emergency department with dyspnea. Axial 0.625-mm from CT pulmonary angiography examination with contrast (CTPA) images demonstrate a thin, linear right-sided filling defect extending from the right interlobar pulmonary artery (A and B, red arrows) into the right middle lobar artery (B, yellow arrow), consistent with acute pulmonary embolism (PE). The finding was described in the radiology report; however, the AI result was negative for PE. Adjudication was consistent with acute PE.
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Calculation of radiological peritoneal cancer index (rPCI) adapted from Sugarbaker et al (1). (a) Coronal CT showing regions 0–8. Vertical lines are drawn along the right and left midclavicular line and the horizontal lines along the costal margin and the iliac crests. (b) Coronal CT showing regions 9 to 12. The vertical and the horizontal lines are through the umbilicus divide the small bowel and mesentery into proximal and distal jejunal and ileal regions. Images are republished under a Creative Commons license (CC BY 4.0).
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