Body MRI Handbook 2026: A Clinical Textbook Covering Hepatobiliary, Genitourinary, and Oncologic Diagnostic Interpretation for Radiology Residents

Built for the radiology resident and practicing radiologist converting a signal intensity, an enhancement curve, or a diffusion value into a defensible category before the tumor board starts, this reference connects MR tissue-characterization physics - chemical shift, diffusion restriction, contrast kinetics - to the categorical frameworks driving management across every abdominal, pelvic, and thoracic organ system. It moves from foundational artifact recognition through hepatobiliary, pancreatic, splenic, adrenal, genitourinary, gynecologic, and gastrointestinal interpretation into whole-body, pediatric, fetal, and cardiac applications, isolating the discriminating step that separates a true finding from its most dangerous mimic at every stop. The Signal-to-Category Decision System, a five-part reasoning framework built into every chapter and consolidated in a cross-referenced master index, turns tissue-characterization physics into a category you can defend on rounds. What This Reference Puts in Your Hands ¿ Separate lipid-poor adenoma from true pathology - the chemical shift signal-drop physics behind a false-negative fat call.¿ Assign LI-RADS with confidence - the pseudocapsule trap separating a true LR-5 capsule from mimicking rim enhancement.¿ Work the Bosniak ladder to a defensible category - septation, thickness, and true-enhancement criteria separating a III from a IV.¿ Apply PI-RADS by zone, not by habit - the differing peripheral- versus transition-zone criteria that prevent reflex miscategorization.¿ Stage rectal cancer on the mesorectal fascia - the measured tumor-to-fascia distance that decides neoadjuvant sequencing.¿ Score the Peritoneal Cancer Index region by region - a systematic method anticipating cytoreductive candidacy before the surgeon does.¿ Distinguish Wilms tumor from neuroblastoma - the claw sign and vessel-encasement pattern establishing organ of origin.¿ Quantify myocardial viability segment by segment - the transmural late-gadolinium threshold that decides revascularization candidacy.