FDA issues radiation alert after CT brain perfusion overexposure

Oct 7, 2009

The U.S. Food and Drug Administration is investigating cases of radiation overexposure during CT brain perfusion scans conducted to aid the diagnosis and treatment of stroke. The agency said that at one particular facility, patients received radiation doses that were eight times the expected level.

Click here to read the rest of the article.

Latest in CT
Lung Illustration Blue
ARRS: The state of lung imaging
May 1, 2025
Representative images from diagnostic analysis of deep learning (DL)-based CT myocardial perfusion imaging (MPI). (A-D) Representative images in a 51-year-old woman with stable angina at presentation. (A) Curved planar reformation and (B) three-dimensional maximum intensity projection images show severe stenosis of the opening left anterior descending artery (arrow). (C) Fractional flow reserve (FFR) determined with invasive coronary angiography helps confirm that there was no hemodynamic significance of the opening left anterior descending artery lesion (arrow). (D) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. Myocardial blood flow (MBF) derived from DL-based CT MPI revealed the absence of decreased myocardial perfusion of the left anterior descending artery territory (the areas outlined in black represent the myocardium subtended by the left anterior descending stenosis, and the color bar is a graphical scale that maps MBF ranges). (E-H) Representative images in a 62-year-old man with exertional chest pain at presentation. (E) Curved planar reformation and (F) three-dimensional maximum intensity projection images show moderate stenosis of the middle left anterior descending artery (arrow). (G) FFR determined at invasive coronary angiography helps confirm that the middle left anterior descending lesion was hemodynamically significant (arrow). (H) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. DL-based CT MPI showed a reduction in MBF within the middle and basal anterior wall of the left anterior descending artery territory (the areas outlined in black represent the myocardium with decreased perfusion, and the color bar is a graphical scale that maps MBF ranges). MBFDL = MBF derived from the DL model.
DL model can aid in diagnosing myocardial ischemia
April 29, 2025
Watch how the NAEOTOM Alpha class was brought to life
Sponsored
Watch how the NAEOTOM Alpha class was brought to life
February 1, 2025
Cardiac Heart Eeg Social (1)
ScImage and Echo IQ partner to enhance cardiac imaging workflows
April 25, 2025
Related Stories
2009 03 02 17 08 56 389 2009 03 02 Radioactive Symbol
CT
FDA issues radiation alert after CT brain perfusion overexposure
2009 10 02 11 32 58 200 Mummy 70
CT
Austrian study uses MDCT to uncover tale of 12 mummies
2009 09 22 13 18 45 142 Rogalla thumb 09 09
CT
VC excels at diverticulosis staging
Watch how the NAEOTOM Alpha class was brought to life
Sponsor Content
Watch how the NAEOTOM Alpha class was brought to life
More in CT
ARRS: The state of lung imaging
By Kate Madden Yee
There are a number of options for lung nodule imaging, and which to use depends on the patient.
May 1, 2025
Lung Illustration Blue
DL model can aid in diagnosing myocardial ischemia
By Will Morton
A deep-learning (DL) model can automatically measure myocardial blood flow on CT scans to help diagnose myocardial ischemia.
April 29, 2025
Representative images from diagnostic analysis of deep learning (DL)-based CT myocardial perfusion imaging (MPI). (A-D) Representative images in a 51-year-old woman with stable angina at presentation. (A) Curved planar reformation and (B) three-dimensional maximum intensity projection images show severe stenosis of the opening left anterior descending artery (arrow). (C) Fractional flow reserve (FFR) determined with invasive coronary angiography helps confirm that there was no hemodynamic significance of the opening left anterior descending artery lesion (arrow). (D) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. Myocardial blood flow (MBF) derived from DL-based CT MPI revealed the absence of decreased myocardial perfusion of the left anterior descending artery territory (the areas outlined in black represent the myocardium subtended by the left anterior descending stenosis, and the color bar is a graphical scale that maps MBF ranges). (E-H) Representative images in a 62-year-old man with exertional chest pain at presentation. (E) Curved planar reformation and (F) three-dimensional maximum intensity projection images show moderate stenosis of the middle left anterior descending artery (arrow). (G) FFR determined at invasive coronary angiography helps confirm that the middle left anterior descending lesion was hemodynamically significant (arrow). (H) Dynamic CT MPI provided functional information to identify hemodynamically significant stenosis with reference to invasive FFR. DL-based CT MPI showed a reduction in MBF within the middle and basal anterior wall of the left anterior descending artery territory (the areas outlined in black represent the myocardium with decreased perfusion, and the color bar is a graphical scale that maps MBF ranges). MBFDL = MBF derived from the DL model.
ARRS: Radiologists can help PCPs boost lung cancer screening rates
By Kate Madden Yee
Radiologists can help boost lung cancer screening uptake by educating and supporting their primary care provider peers (PCP).
April 29, 2025
Lung Cancer
ScImage and Echo IQ partner to enhance cardiac imaging workflows
By AuntMinnie.com staff writers
ScImage has integrated EchoSolv AS into its cloud-native Picom365 platform for cardiology.
April 25, 2025
Cardiac Heart Eeg Social (1)
Most veterans adhere to post-EVAR surveillance imaging
By Amerigo Allegretto
Adherence to surveillance imaging after endovascular abdominal aortic aneurysm repair (EVAR) is high among veterans.
April 24, 2025
Heart Valves 3 D Base Thumbnail
Quantitative CT textures of the lung help assess COPD severity
By Kate Madden Yee
Quantitative CT can capture lung inflammation patterns to assess the severity of chronic obstructive pulmonary disease (COPD).
April 23, 2025
Copd
Machine learning standardizes bone tumor grading on MRI, CT
By Kate Madden Yee
An AI algorithm and an updated risk stratification system produce accurate and standardized bone lesion assessment on CT and MRI.
April 22, 2025
2025 04 22 Radiology Lemore Figure2 Thumbnail
Nonsmokers also benefit from lung cancer screening
By Kate Madden Yee
Lung cancer screening finds disease in nonsmokers at comparable rates as their smoking peers, researchers have reported.
April 21, 2025
Lung Cancer
Abdominal CT imaging shows potential for diagnosing sarcopenia
By Kate Madden Yee
Abdominal CT imaging shows potential for the opportunistic diagnosis of sarcopenia, enabling radiologists to play a greater role in population health management.
April 18, 2025
Sarcopenia Strips Of Paper
AAPM responds to CT cancer risk study
By Will Morton
In response to study results that link CT scans to new cases of cancer, the AAPM argues the benefits of these exams far outweigh the risks.
April 15, 2025
Lung Cancer
CT images best EHR coding, CT reports for sarcopenic obesity diagnosis
By Kate Madden Yee
CT images best electronic health record (EHR) and CT report data when it comes to diagnosing sarcopenia and sarcopenic obesity.
April 15, 2025
2025 04 15 Radiology Chaves Figure1 Thumbnail
CT estimated to cause 5% of new cancer cases
By Will Morton
Researchers suggest that cancers associated with radiation from CT scans could eventually account for 5% of all new cases annually.
April 14, 2025
Radiation Logo Base Bna
Page 1 of 665
Next Page