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
Radiation Logo Base Thumbail
Page 1 of 1
Top Stories
An example of a typical BgRT plan: A) PET scan on diagnostic PET/CT and B) X1 PET-Linac for patient #15 with a PET avid rib metastasis with GTV size= 3.1 cc, PTV = GTV + 5mm, BTZ (biological tracking zone) = PTV + 5 mm, AC = 14.33 kBq/mL and NTS = 21.04. Red, magenta, and green contours represent GTV, PTV, and BTZ. C) Dose distribution and D) bounded-DVH of a BgRT plan are displayed for the same patient. The bounded Dose-Volume Histogram (DVH) models variations in BgRT delivery, encompassing fluctuation in target background signal variation, target localization and dose delivery uncertainties.
Radiation Oncology/Therapy
Radiation oncologists put RefleXion’s X1 system to the test
A pilot study demonstrates the potential feasibility of using RefleXion's X1 unit in patients with prostate cancer.
Patient Physical Exam
Ultrasound
Is it time to ditch physical exams before ultrasound?
Ct Scan Woman
CT
AAPM critiques study regarding CT before pregnancy
Ai Hand
Home
Mammography acquisition parameters affect both AI, radiologist reads
Cancelled
Home
What prompts radiology department cancellations of imaging orders?
More in CT
AAPM critiques study regarding CT before pregnancy
By Kate Madden Yee
The AAPM sought to put the research into perspective, noting that "comorbidities, not radiation dose, likely explain study results."
September 19, 2025
Ct Scan Woman
Imaging linked to blood cancers in children and adolescents
By Will Morton
Researchers suggest that medical imaging may be associated with 10.1% of hematologic cancers.
September 18, 2025
Children
DL algorithm estimates lung nodule cancer risk, reduces false positives
By Kate Madden Yee
The deep-learning (DL) tool reduced false-positive results by almost 40% and showed high cancer detection rates.
September 16, 2025
2025 09 16 Radiology Antonissen Fig4 Thumbnail
CCTA reveals that CAD can occur in the absence of typical risk factors
By Kate Madden Yee
Patients without coronary artery disease (CAD) risk factors may exhibit a similar degree of coronary inflammation to those with them.
September 15, 2025
Heart Pulmonary Trunk
6 key ways to evaluate the heart on chest CT imaging in the ED
By Kate Madden Yee
Researchers have published two checklists for noncardiac radiologists to use when evaluating chest CT exams taken in the ED.
September 12, 2025
2025 09 11 Radiology Cadour Figure10 Thumbnail
General-purpose LLMs can be used to track true critical findings
By Liz Carey
Experts from Stanford and Mayo Clinic Arizona tested few-shot prompting effectiveness with GPT-4 and Mistral-7B.
September 10, 2025
Chatgpt Artificial Intelligence Ai Head n9f Ar0 G2 Ll
RT's MRI, CT exam prep booklets mitigate children's anxieties
By Kate Madden Yee
Giuseppe Scappatura penned the booklets to help children face the exams with "greater serenity and collaboration."
September 10, 2025
Scappatura Giuseppe Book Covers Thumbnail
Experts propose generalist radiology AI framework
By Liz Carey
A team of researchers outlined five key features of diagnostic generalist radiology AI (GRAI).
September 9, 2025
2025 09 09 Generalist Radiology Ai Six Diagnoses Thumbnail
Low-dose CT ties emphysema to mortality in previous smokers
By Amerigo Allegretto
Study findings highlight the clinical relevance of CT-diagnosed emphysema.
September 9, 2025
Representative axial images of mild, moderate, and severe emphysema at baseline low-dose CT (LDCT). Participants were categorized as having no emphysema or mild, moderate, or severe emphysema. When present, emphysema was mild if no distinct regions of reduced attenuation were visible on the CT scan, but vascular splaying indicates parenchymal expansion, or if only occasional discrete low-attenuation regions were observed. Moderate emphysema was defined by the presence of identifiable low-attenuation regions affecting less than half of the lung parenchyma, whereas severe emphysema was defined by the presence of identifiable low-attenuation regions that involved more than half of the lung parenchyma. A scoring system from 0 to 3 was applied, corresponding to none, mild, moderate, and severe emphysema, respectively. Yellow circle indicates the extent of emphysema. (A) A 67-year-old man with mild emphysema at baseline LDCT in 2002. Baseline LDCT scan shows vascular splaying, suggesting parenchymal expansion due to emphysema and occasional discrete low-attenuation regions. The participant ultimately died of cardiovascular disease 15.4 years (184.2 months) later. (B) A 69-year-old man with moderate emphysema at baseline LDCT in 2007. The participant died of cardiovascular disease 1.8 years (21.9 months) later. Identifiable low-attenuation regions affected less than half of the lung parenchyma. (C) An 85-year-old woman with severe emphysema at baseline LDCT in 2006. After 5.5 years (65.5 months) of follow-up, the participant died due to chronic obstructive pulmonary disease–related causes. Identifiable low-attenuation regions involved more than half of the lung parenchyma.
Siemens highlights early lung cancer diagnosis CT technology at WCLC
By AuntMinnie.com staff writers
The technology, highlighted at the World Conference on Lung Cancer (WCLC), was developed in collaboration with Intuitive.
September 8, 2025
Siemens
ISCT: CT is an ideal imaging modality for cardiometabolic screening
By Kate Madden Yee
Tracking biomarkers on CT could help clinicians better predict patient outcomes.
September 5, 2025
Ct Scanner Control Room2 Radiologist
U.S. FDA clears 4DMedical's ventilation-perfusion CT:VQ imaging system
By AuntMinnie.com staff writers
CT:VQ converts standard, noncontrast chest CTs into quantitative, lobar ventilation, and perfusion maps.
September 5, 2025
Ct Scanner 6563edb5e443e
Page 1 of 671
Next Page