Dr. Paul Wallner

Radiation Oncology/Therapy
Payment parity in radiation therapy best serves cancer patients
Freestanding radiation treatment centers play a vital role in ensuring access to state-of-the-art radiation therapy. But a recent article on AuntMinnie.com about reimbursement rates at these centers provided a misleading picture, according to Dr. Paul Wallner, senior vice president of 21st Century Oncology.
October 16, 2014
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Residents/Fellows
American Board of Radiology exams: What's new?
If you're currently a radiology resident, the board exams are probably in your immediate future. It can be tempting to try to find copies of past questions to help you study; however, that's a bad idea, according to this editorial by the American Board of Radiology, which is getting serious about exam integrity.
May 18, 2011
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Top Stories
(A) System comprises detectors and silicon photomultipliers with custom Hoffman brain phantom. (B) Seated-position scanning. (C) Backpack system permitting data collection in ambulatory states. (D) Workstation scenario demonstrating natural seated use.
Molecular Imaging
Chinese scientists develop wearable brain PET system
The system could offer new opportunities for brain PET imaging beyond the constraints of conventional static systems.
Contrast Filters
CT
Reducing head-neck CTA contrast by 40% saves costs, preserves quality
Radiation Therapy Suite
Womens Imaging
Foregoing SLN breast surgery does not lead to radiation therapy increase
Minnie Cast Thumbnail (3) (1)
Ultrasound
Ultrasound MinnieCast, Episode 7: How VR training in ultrasound is evolving
Radiology is Under Pressure
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Radiology is Under Pressure
More in Home
Chinese scientists develop wearable brain PET system
By Will Morton
The system could offer new opportunities for brain PET imaging beyond the constraints of conventional static systems.
May 1, 2026
(A) System comprises detectors and silicon photomultipliers with custom Hoffman brain phantom. (B) Seated-position scanning. (C) Backpack system permitting data collection in ambulatory states. (D) Workstation scenario demonstrating natural seated use.
Reducing head-neck CTA contrast by 40% saves costs, preserves quality
By Kate Madden Yee
"Standardized contrast dose reduction for [head-neck] CTA is feasible, sustainable, and does not compromise imaging."
May 1, 2026
Contrast Filters
Foregoing SLN breast surgery does not lead to radiation therapy increase
By Amerigo Allegretto
Research presented at the ASBrS annual meeting showed that omitting SLN surgery does not increase radiation therapy rates.
May 1, 2026
Radiation Therapy Suite
Ultrasound MinnieCast, Episode 7: How VR training in ultrasound is evolving
By Amerigo Allegretto
Stefanie Woodard, DO, talks virtual reality in ultrasound education and shares study results she presented at ARRS.
May 1, 2026
Minnie Cast Thumbnail (3) (1)
NET tracers first widened, then closed imaging access gap
By Will Morton
Ga-68 DOTATATE/DOTATOC captured 33.8% market share in its 2017 debut and reached 90.9% by 2020.
April 30, 2026
Adobe Stock 107601498
Preventative screening and the future of endometriosis care
In a column, SimonMed chief medical officer and chief innovation officer Sean Raj, MD, MBA, shares how radiology is poised to lead the transformation of endometriosis care.
April 30, 2026
Sean Raj, MD, MBA
JAMA: LCS uptake increases, but still remains low -- with uneven gains
By Kate Madden Yee
One in four Americans eligible for lung cancer screening (LCS) received it in 2024.
April 30, 2026
Lung Cancer
CT-based nomogram aids in managing advanced ovarian cancer
By Amerigo Allegretto
Researchers have developed a CT-based nomogram that could assist in managing advanced ovarian cancer.
April 29, 2026
Calculation of radiological peritoneal cancer index (rPCI) adapted from Sugarbaker et al (1). (a) Coronal CT showing regions 0–8. Vertical lines are drawn along the right and left midclavicular line and the horizontal lines along the costal margin and the iliac crests. (b) Coronal CT showing regions 9 to 12. The vertical and the horizontal lines are through the umbilicus divide the small bowel and mesentery into proximal and distal jejunal and ileal regions. Images are republished under a Creative Commons license (CC BY 4.0).
4 CT signs help predict ischemia in small bowel obstruction
By Kate Madden Yee
The signs "could be prioritized when interpreting CT examinations in patients with SBO to help guide surgical decision-making."
April 29, 2026
Inflammatory Bowel Crohns
MRI reveals occurrence of placental contractions
By Kate Madden Yee
Characterizing these contractions could help clinicians better understand the placenta's function.
April 29, 2026
Uterine and placental changes during an example placental contraction. The top row shows axial MRI images at selected times points before, during and after a placental contraction (indicated by vertical lines on the graph below) with segmentations shown below. Changes in placental and non-placental volumes, wall areas and placental R2* (all measured across the whole volume of the uterus, not just the single slice shown) are plotted underneath. The legend indicates the colors used for the lines in the plots and the regions indicated in the segmentation.
Lu-177 PSMA-SPECT/CT predicts survival in mCRPC
By Will Morton
Lu-177 PSMA-617 SPECT/CT total tumor volume complete response at six weeks associated with overall survival.
April 29, 2026
Quantification of total tumor volume (TTV) at lutetium-177 prostate-specific membrane antigen (PSMA)–617 SPECT/CT shows heterogeneous TTV responses between dose 1 (Cycle #1) and dose 2 (Cycle #2) in participants with metastatic castration-resistant prostate cancer. Posttherapy coronal attenuation-corrected noncontrast SPECT/CT maximum intensity projection images demonstrate (A) near-complete response in a 76-year-old man, (B) complete response in an 83-year-old man, (C) partial TTV reduction (not complete response) in a 69-year-old man, and (D) TTV increase (i.e. progressive disease) in a 74-year-old man. Blue-shaded regions represent semiautomatically segmented PSMA-avid tumor volume, with associated TTV values given at the bottom of each panel. The gradient bar shows standardized uptake value (SUV) from 0 to 5.
AI algorithm shines in spotting early pancreatic cancer
By Kate Madden Yee
The findings could help shift diagnosis of PDA from late-stage terminal disease to early-stage treatable disease.
April 28, 2026
Pancreas New
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