Todd Pietila

Advanced Visualization
Tips for implementing 3D printing at your hospital
Although 3D printing as a core service in healthcare is still in its infancy, many innovative institutions have been blazing a path. In this article, Todd Pietila of 3D software developer Materialise offers tips for starting a 3D printing service at your facility.
November 3, 2015
2015 11 03 14 55 43 360 3d Printing Fig8 200
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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.
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AAPM critiques study regarding CT before pregnancy
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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.
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Physical exams are omitted in over half of patient cases, and it seems diagnostic outcomes are unaffected.
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AAPM critiques study regarding CT before pregnancy
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The AAPM sought to put the research into perspective, noting that "comorbidities, not radiation dose, likely explain study results."
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Cancelled
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By Will Morton
Currently, few noninvasive tests are available for diagnosing the swallowing condition.
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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).
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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).
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Hpi Logo
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