Louise Gagnon

Economics
Technology and a personal touch can drive postpandemic growth
Now, two-and-a-half years after the initial COVID-19 pandemic lockdown, many radiology practices are experiencing pressure to grow – even as many groups are still in recovery mode.
October 24, 2022
2022 10 20 22 21 8160 Unity Growth Concept 400
Breast
Pandemic caused screening mammo shortfall in Ontario
Over 400,000 fewer mammograms were performed in the Canadian province of Ontario during the COVID-19 pandemic than would have otherwise been conducted, according to an analysis released by the Ontario Medical Association.
October 16, 2022
2016 08 18 13 26 22 430 Breast Screening Mammo 400
CT
'A diagnostic revolutionary' -- the legacy of Godfrey Hounsfield
CT has become a vital form of medical imaging that is ubiquitous throughout the world, offering powerful insights into the human body. Most of the credit for the development of CT goes to Sir Godfrey Hounsfield, the U.K. scientist who developed the first CT scanner in 1971.
August 11, 2022
2022 08 11 21 21 9018 Hounsfield Godfrey 400
Industry News
Why leadership in radiology is more than just a title
Today's radiology leaders face myriad challenges. From managing pandemic-related workplace disruptions to coping with historic turnover in the labor force, leaders of radiologists, radiology administrators, and radiologic technologists need to be empowered to make decisions and thrive in their professional positions.
July 14, 2022
2022 07 11 17 05 1894 Business Leader Speaker Woman 400
CT
National funds needed to update imaging equipment in Canada
Canada's inadequate and outdated inventory of medical imaging equipment requires that some scanners be retired to make way for new technology, which will require a massive injection of funds from the national government.
May 25, 2022
2022 05 25 23 12 6141 Canada Flag Sunset 400
MRI
Pancreatic cysts present screening challenge for radiologists
What's the best way to handle cysts detected in the pancreas on imaging exams? Such lesions are relatively common, but only a small number are malignant, so figuring out suitable management surveillance can be a challenge.
April 20, 2022
2018 03 06 00 04 4002 Pancreas New 400
Breast
Applying ACR's TI-RADS, ATA guidelines reduces biopsies and costs
Adhering to the American College of Radiology (ACR) Thyroid Imaging Reporting and Data System (TI-RADS) or the American Thyroid Association (ATA) risk stratification guidelines decreases the number of thyroid biopsies and reduces healthcare costs, according to research presented at the recent annual meeting of the Canadian Association of Radiologists.
April 19, 2022
2019 10 24 23 31 2630 Breast Biopsy Mammotome 400
Breast
MRI double reading can reduce unnecessary biopsies
Double reading of MRI examinations in women with high risk of breast cancer can reduce the number of unneeded biopsies, decrease false-positive results, and improve detection of malignancies, according to research presented recently at the Canadian Association of Radiologists annual meeting.
April 18, 2022
2020 02 25 00 02 3958 Mri Breast Cancer 20200225002942
Breast
Did Choosing Wisely really reduce unnecessary imaging?
The Choosing Wisely initiative was designed to reduce unnecessary medical procedures. But a new analysis of the project's impact on two imaging scenarios -- staging for prostate and breast cancer -- raises questions about its effectiveness.
April 13, 2022
2020 09 10 18 58 9346 Ct Scanner Control Room2 Radiologist 400
Ultrasound
Use of ultrasound contrast lags, despite its clear benefits
While there are passionate advocates for ultrasound contrast in radiology and other medical specialties, its use has failed to expand -- despite the fact that it offers solid benefits, according to ultrasound experts.
January 17, 2022
2022 01 14 21 47 9176 Bubbles Ultrasound Contrast 400
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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
Home
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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