In this Journal Jam we have Dr. Michelle Lin from Academic Life in EM interviewing two authors, Dr. Rebecca Smith‑Bindman, a radiologist, and Dr. Ralph Wang an EM physician both from USCF on their article “Ultrasonography versus Computed Tomography for suspected Nephrolithiasis” published in the New England Journal of Medicine in 2014. There is currently a wide practice variation in the imaging work-up of the patient who presents to the ED with a high suspicion for renal colic. On the one extreme, some EM physicians use CT to screen all patients who present with renal colic, while on the other extreme, other EM physicians do not use any imaging on any patient who has had previous imaging. The role of POCUS and radiology department ultrasound as an alternative to CT in the work up of renal colic has not been clearly defined in the ED setting. This study was a pragmatic multi-centre randomized control trial of patients in whom the primary diagnostic concern was renal colic, that tried to answer the question: is there a significant difference in the serious missed diagnosis rate, serious adverse events rate, pain, return visits, admissions to hospital, radiation dose and diagnostic accuracy if the EM provider chose POCUS, radiology department ultrasound or CT for their initial imaging modality of choice. This Journal Jam is peer review by EMNerd's Rory Spiegel. [wpfilebase tag=file id=618 tpl=emc-play /] [wpfilebase tag=file id=619 tpl=emc-mp3 /]