Dr. Alexander Sardiña

Breast
Bringing humans and AI together to improve mammography outcomes
Could artificial intelligence (AI) yield more accurate breast cancer screening while also decreasing the workload of radiologists? Dr. Alexander Sardiña of AI software developer Whiterabbit makes the case that combining artificial and human intelligence will deliver the best results.
August 18, 2022
2021 03 25 00 42 3403 Mammography Breast Ipad Patient 400
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A ChatGPT-generated slide presented by Jack Brunner, MD, at ARRS on April 12, as he described fielding a flood of calls and messages from colleagues over Katz's comment.
AI
ARRS: Radiology chief fires back over claim AI could replace radiologists
Ultimately, AI technology itself isn’t ready.
Representative axial T1-weighted spin-echo thigh MRI scans in (A) a 61-year-old female participant and (B) a 62-year-old female participant. Both participants were of similar age and body mass index (BMI, calculated as weight in kilograms divided by height in meters squared). Both had Physical Activity Scale for the Elderly scores above the mean score in the study. According to the World Health Organization definition, the participant in B qualified as having abdominal obesity (abdominal circumference ≥ 88 cm). Abdominal circumference is a measure of central obesity that captures fat distribution and serves as an indicator of cardiometabolic health. Compared with the participant in A, the participant in B had a higher proportion of ultra-processed food (UPF) in their diet (87.1% vs 29.5%) and exhibited fattier thigh muscles bilaterally, with Goutallier grade (GG) for all thigh muscles summing to 25 for the participant in A and 38 for the participant in B.
MRI
MRI highlights worse muscle health from ultra-processed foods
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Practice Management
Most MIPS quality measures 'topped out' based on a fraction of physicians
Prostate 3 D Social
Ultrasound
MRI-guided ultrasound ablation outperforms surgery in prostate cancer
Ellen Sun, MD, outlines how emergency radiologists can prepare for downtimes caused by system malfunctions or cyberattacks at ARRS 2026.
Emergency Radiology
ARRS: Emergency radiologists can plan for care during system downtimes
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ARRS: Radiology chief fires back over claim AI could replace radiologists
By Will Morton
Ultimately, AI technology itself isn’t ready.
April 14, 2026
A ChatGPT-generated slide presented by Jack Brunner, MD, at ARRS on April 12, as he described fielding a flood of calls and messages from colleagues over Katz's comment.
MRI highlights worse muscle health from ultra-processed foods
By Erik L. Ridley
A study has found that ultra-processed food consumption is tied to higher thigh-muscle fat infiltration on MRI.
April 14, 2026
Representative axial T1-weighted spin-echo thigh MRI scans in (A) a 61-year-old female participant and (B) a 62-year-old female participant. Both participants were of similar age and body mass index (BMI, calculated as weight in kilograms divided by height in meters squared). Both had Physical Activity Scale for the Elderly scores above the mean score in the study. According to the World Health Organization definition, the participant in B qualified as having abdominal obesity (abdominal circumference ≥ 88 cm). Abdominal circumference is a measure of central obesity that captures fat distribution and serves as an indicator of cardiometabolic health. Compared with the participant in A, the participant in B had a higher proportion of ultra-processed food (UPF) in their diet (87.1% vs 29.5%) and exhibited fattier thigh muscles bilaterally, with Goutallier grade (GG) for all thigh muscles summing to 25 for the participant in A and 38 for the participant in B.
Most MIPS quality measures 'topped out' based on a fraction of physicians
By Kate Madden Yee
CMS designates MIPS measures as "'topped out'" when reporting clinicians consistently achieve high performance.
April 14, 2026
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MRI-guided ultrasound ablation outperforms surgery in prostate cancer
By Will Morton
TULSA may allow patients to recover more quickly and maintain a better quality of life following treatment.
April 14, 2026
Prostate 3 D Social
ARRS: Emergency radiologists can plan for care during system downtimes
By Amerigo Allegretto
Emergency radiologists can take steps toward weathering system failures from malfunctions and cyberattacks.
April 14, 2026
Ellen Sun, MD, outlines how emergency radiologists can prepare for downtimes caused by system malfunctions or cyberattacks at ARRS 2026.
Abbreviated breast MRI after chemotherapy comparable to full protocol
By Kate Madden Yee
The findings could translate into more tailored patient care, researchers noted.
April 14, 2026
Post-neoadjuvant chemotherapy (NAC) MRI scans in a 66-year-old woman with invasive breast cancer show a lesion that appears fragmented in the first postcontrast axial T1-weighted image (arrow in A) but becomes more conspicuous and homogeneous in the last delayed phase (arrow in B). Despite these visual differences, response classification was identical between abbreviated and full diagnostic MRI. Pathologic analysis confirmed a partial response with residual invasive carcinoma.
ARRS: CTA may have key role in imaging SCAD
By Amerigo Allegretto
CTA could be a viable imaging technique in imaging sudden coronary artery dissection (SCAD), an ARRS presentation suggested.
April 14, 2026
Brian Ghoshhajra, MD, presents the case for CT angiography (CTA) as an optimal imaging test for sudden coronary artery dissection (SCAD) at ARRS 2026.
MRI shows link between aneurysm and cumulative combat blast exposure
By Kate Madden Yee
"These findings suggest that repeated blast exposure may leave a measurable vascular signature in the brain," researchers noted.
April 14, 2026
Representative axial time-of-flight MR angiography image in a 39-year-old male participant shows a laterally projecting intracranial aneurysm (arrow) originating from the right cavernous segment of the internal carotid artery.
ARRS: Do GLP-1 drugs confound FDG-PET imaging scans?
By Will Morton
No significant differences in FDG uptake were observed in the skeletal muscle, liver, blood pool, or abdominal fat following GLP-1 agonist therapy.
April 13, 2026
Patient Pet
FDA strikes down radiology AI 510(k) exemption arguments
By Liz Carey
Regulator rejects broad statement of user capabilities in detecting performance issues.
April 13, 2026
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ARRS: How should breast imagers develop surveillance strategies?
By Amerigo Allegretto
An ARRS presentation explored surveillance imaging strategies for breast cancer survivors.
April 13, 2026
Derek Nguyen, MD, shares insights on surveillance imaging strategies for women with a personal history of breast cancer at ARRS 2026.
Population-level lung cancer rate higher than NLST rate
By Kate Madden Yee
Researchers reported a higher lung cancer detection rate after a shorter follow-up period.
April 13, 2026
Lung Ct Images
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