Lesson 1Indications and timing for follow-up imaging and use of ultrasound or MRI in equivocal or pregnant patientsThis part reviews when to rescan, how patient changes guide scan type, and ultrasound or MRI roles in unclear, child, or pregnant cases, balancing accuracy, radiation, and contrast safety.
Clinical triggers for repeat imagingUltrasound technique in suspected appendicitisMRI protocols in pregnancy and pediatricsBalancing radiation risk and diagnostic yieldWhen CT remains necessary in pregnancyLesson 2Antibiotic and perioperative considerations tied to imaging findings (e.g., extent of contamination, abscess)This part links CT findings to antibiotics and surgery prep, like spill spread, abscess size, sepsis risk, surgery timing, prevention choices, and treatment length by scan severity.
Imaging predictors of severe contaminationAbscess burden and antibiotic spectrumTiming of surgery after source controlCT guidance for postoperative prophylaxisImaging clues to resistant or atypical infectionLesson 3CT features of complicated appendicitis: perforation, phlegmon, localized abscess, free intraperitoneal air, and small-bowel obstructionThis part reviews CT signs of tricky appendicitis, like burst, swelling mass, abscess, free air, bowel block, and spotting subtle clues that change urgency and fix type.
Direct and indirect signs of perforationDistinguishing phlegmon from abscessDetection of free intraperitoneal airSmall-bowel obstruction related to appendicitisPredictors of postoperative complicationsLesson 4Measurement and characterization of periappendiceal abscesses: size, loculation, gas, and adjacent bowel involvementThis part shows how to measure and describe appendix-area abscesses on CT, like size, pockets, gas, nearby bowel ties, and how these guide draining ease, path, and speed.
Standardized abscess size measurementsLoculation, septations, and complexityGas patterns and fistula suspicionAdjacent bowel and organ involvementSelecting candidates for percutaneous drainageLesson 5Contrast-enhanced CT protocols for acute abdomen: oral/IV contrast considerations, phases, and low-dose techniquesThis part details contrast CT plans for sudden belly pain, covering IV timing, oral needs, scan phases, low-dose ways to keep quality while cutting radiation and contrast risks.
IV contrast timing and injection parametersRole of oral contrast in suspected appendicitisSingle versus multiphasic acquisition choicesLow-dose and iterative reconstruction methodsManaging contrast allergy and renal riskLesson 6Reporting format for abdominal CT in acute appendicitis: concise findings, severity grading, and recommended next stepsThis part outlines clear CT report style for suspected appendicitis, stressing must-have parts, severity levels, plain summaries, and direct next actions for quick, right care.
Essential elements of the CT reportStandardized severity grading systemsClear impression and diagnostic certaintyActionable management recommendationsCommunicating critical and unexpected findingsLesson 7Interventional radiology and surgical decision-making: indications for percutaneous drainage vs. appendectomy vs. antibiotics-first strategiesThis part explains how CT guides picking antibiotics only, needle drain, or surgery, stressing abscess size, sepsis, other health issues, and team talks between radiology, surgery, and procedures.
CT criteria for antibiotics-first therapyIndications for percutaneous abscess drainageWhen urgent appendectomy is preferredImaging predictors of treatment failurePost-procedure imaging and complication checksLesson 8Primary CT findings of acute appendicitis: appendiceal diameter, wall thickening/enhancement, periappendiceal fat strandingThis part describes main CT signs of acute appendicitis, like tube width, wall swell, glow-up, fat changes around, plus measure tips and traps mimicking or hiding it.
Measuring appendiceal diameter accuratelyAssessing wall thickening and enhancementCharacterizing periappendiceal fat strandingLuminal obstruction, fecalith, and fluidCommon pitfalls and normal variantsLesson 9CT anatomy of the right lower quadrant: appendix variants, cecum, terminal ileum, mesoappendix, and adjacent structuresThis part reviews right lower belly CT views, like colon start, end small gut, appendix support, blood paths, common appendix spots and types affecting spot, read, surgery plans.
Identifying the cecum and ileocecal valveLocating the normal appendix on CTRetrocecal and pelvic appendix positionsMesoappendix, vessels, and lymph nodesCongenital and postsurgical anatomic variantsLesson 10Differentiating appendicitis from mimics: terminal ileitis, Meckel diverticulitis, Crohn disease, epiploic appendagitis, right-sided diverticulitisThis part spotlights CT ways to tell appendicitis from mimics like end gut inflammation, Meckel pouch flare, Crohn, fat tag issue, right colon pouchitis, via wall look, spot, fat shifts.
Terminal ileitis versus appendicitis on CTCrohn disease activity in the right lower quadrantCT signs of Meckel diverticulitisRecognizing epiploic appendagitisRight-sided colonic diverticulitis features
