Ian Chan, MD, MPH, FRCPC

Thanks @AdamKassamMD for your leadership during this harrowing time and for the kind mention! 🙏 @westernurad

An AI that detects occult pancreatic cancer better than radiologists (73 vs 39%) via CT with external validation gut.bmj.com/content/early/…

@ShivaprakashBH4 @elka_miller @DrNeetikaGupta @RadioGraphics Great work!!

Congenital Posterior Fossa Malformations: Imaging Patterns and Diagnostic Approach. An amazing learning experience putting it together. Thank you for the help, guidance and mentorship @elka_miller @DrNeetikaGupta Drs. Krishnan and Shinar @RadioGraphics doi.org/10.1148/rg.250…

@WillyRontgen Sectra!

Quick survey of rads. What is the best PACS you have ever used? Reply and I will tally results and post follow up.

We see more and more lateral dural tear #CSFleaks with small epidural fluid missed because the correct MRI sequences were not obtained. 3DT2FS really shines in this context. Sometimes the 🔑 isn't new technology, but re-understanding how to look at existing data.

What is the diagnostic yield of MRI in adult emergency patients with dizziness or vertigo? While MRI is efficient for detecting central causes of dizziness, its yield is low in cases of isolated dizziness without neurological signs. 👇 link.springer.com/article/10.100…

⭐️ The carotid body can be normally seen on CTA of the neck as an ovoid avidly enhancing focus at the inferomedial aspect of the carotid bifurcation 💡 Normal range is ~1-4mm, do not mistake this for pathology (dissection, web, pseudoaneurysm, etc.) 💡 When >6 mm, a small carotid paraganglioma should be suspected and further evaluated #Neurology #radres #futureradres #medicine #Neurosurgery #MRI #FOAMed @TheASNR

China's Bytedance just dropped the most advanced video generation model in the world. Seedance 2.0 has: — native audio gen (lipsynced speech + music) — drastic step up from Veo 3.1 / Sora 2 in quality — supports multimodal input — 2k resolution Goes beyond cinematic video, and can do product demos as well. And it's really hard to tell it's AI.

A recent patient story from @Sunnybrook Health Sciences Center highlights how serious #spinalCSFleak can be and shows the importance of a multidisciplinary approach in the treatment of this condition. Read Frank story: shorturl.at/MFnav

Our @TheJNS paper is out: In perimesencephalic SAH, high-res CBCT frequently identifies a basilar perforator pseudoaneurysm supporting an arterial etiology until proven otherwise. Conservative management was associated with excellent outcomes. shorturl.at/qXet7

The largest randomized trial of medical A.I. —Over 100,000 women in Sweden —radiologist + AI vs 2 radiologists, in follow-up —AI added led to 29% more cancer detected, 44% reduced workload, and —Less cancer dx in subsequent 2 years, and, when found, less aggressive thelancet.com/journals/lance…

CTA is over-utilized & under-utilized in many EDs. Can miss high-risk lesions in high-risk clinical events without it. But there is a cost to it when not indicated: extra radiation, potential contrast allergy, negative impact on ED/radiology workflow, resource intensive etc

Total body MRI scans generate lots of false positive results. Then there's the false negatives, too. wapo.st/3ZfYSw5 @PeterWhoriskey

Non-contrast CT findings suggestive of secondary intracerebral haemorrhage. Take a look at our latest review on @ESOstroke @fmazzacane01 @a_charidimou @gboulouis @marco_pasi85 @alessandro5161 academic.oup.com/esj/article/11…

Number of trauma CT scans that would get requested during Home Alone 2

Multinodular & vacuolating neuronal tumor (MVNT) is a rare, benign entity often found incidentally, w/ characteristic MR findings: Subcortical, FLAIR-hyperintense, nonenhancing nodules. In our cohort, most did well w/ conservative management. @JordinaRT_md doi.org/10.1007/s11060…

@MicieliA_MD Thanks for your excellent patient care! Honoured to read one of your last stroke MRIs here (and a positive one).

Today is the last time going to the hospital for stroke call. It’s been quite a journey 🧠💉

Waymo is the exemplar of superhuman AI performance to date. "It’s time to stop treating this like a tech moonshot and start treating it like a public health intervention." nytimes.com/2025/12/02/opi…

Findings from this multiinstitutional study of malignancy in incidental, indeterminate adrenal nodules on contrast-enhanced CT in patients without known cancer provide crucial data to inform management guidelines and reduce unnecessary follow-up. ajronline.org/doi/10.2214/AJ…

Carotid artery stenting for the win for asymptomatic severe carotid stenosis. Very impressive trial by the CREST-2 team. Congratulations! @ChaturvediNeuro #SVIN25 nejm.org/doi/full/10.10…