Denis Le Bihan

MRI
Threats to ultrahigh-field MRI in Europe
A new European directive designed to prevent workers from being exposed to high magnetic fields could potentially have a severe impact on MRI research, warns Denis Le Bihan, director of the NeuroSpin intense-field neuroimaging project at the CEA-Saclay Center in Gif-sur-Yvette, France.
October 8, 2009
2009 10 08 14 44 42 410 Tp Pw 2708 Thumb
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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
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Mammography acquisition parameters affect both AI, radiologist reads
Cancelled
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What prompts radiology department cancellations of imaging orders?
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Radiation oncologists put RefleXion’s X1 system to the test
By Will Morton
A pilot study demonstrates the potential feasibility of using RefleXion's X1 unit in patients with prostate cancer.
September 19, 2025
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.
Is it time to ditch physical exams before ultrasound?
By Amerigo Allegretto
Physical exams are omitted in over half of patient cases, and it seems diagnostic outcomes are unaffected.
September 19, 2025
Patient Physical Exam
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
Mammography acquisition parameters affect both AI, radiologist reads
By Kate Madden Yee
The findings could help clinicians better develop "effective strategies for the clinical integration of AI," researchers noted.
September 18, 2025
Ai Hand
What prompts radiology department cancellations of imaging orders?
By Kate Madden Yee
Although the percentage of radiology cancellations of imaging orders is low, these cancellations are influenced by particular factors.
September 18, 2025
Cancelled
AI model detects achalasia on chest x-rays
By Will Morton
Currently, few noninvasive tests are available for diagnosing the swallowing condition.
September 18, 2025
Saliency maps using Grad-CAM++ (E and H) show the model’s point of interest in chest radiographs (C and F) of patients with achalasia. The model’s point of interest is highlighted with red, yellow, and green. In both the upper and lower panels (E and H), the point of interest is located in a region around the upper esophagus that corresponds to an air esophagogram and/or air-fluid level in the esophagus in the barium esophagogram (D and G).
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
Echogenic rind on breast ultrasound holds diagnostic significance
By Amerigo Allegretto
An echogenic rind on breast ultrasound could spell malignancy for suspicious lesions.
September 17, 2025
Diagnostic transverse ultrasound image of the left breast in a 64-year-old woman shows irregular hypoechoic nonparallel mass with indistinct margins corresponding to palpable finding, assessed as BI-RADS category 4. Both readers assessed mass as having associated echogenic rind with complete circumferential extent (arrowheads). Ultrasound-guided biopsy of mass yielded diagnosis of invasive ductal carcinoma (intermediate grade, luminal A molecular subtype, no lymphovascular invasion).
HPI: Office-based imaging studies are often repeated when read by NPPs
By Kate Madden Yee
The findings highlight the benefit of specialized training when it comes to imaging exam interpretation.
September 17, 2025
Hpi Logo
Sonography experts outline CEUS' advantages, opportunities
By Amerigo Allegretto
While CEUS growth in clinical use has been modest, sonography experts say there is reason for optimism for the technique.
September 17, 2025
Ultrasound Transducer3 400
AI model uses mammograms to predict cardiovascular risk
By Amerigo Allegretto
The researchers report that the algorithm is on par with traditional cardiovascular risk equations.
September 17, 2025
Heart Artificial Intelligence Ai 400
Radiation organizations issue guidance on postmastectomy radiation therapy
By Maryam Payne
ASTRO, ASCO, and SSO have jointly issued updated guidelines on postmastectomy radiation therapy.
September 16, 2025
Radiation Therapy Suite
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