Lesson 1Indications an' timin' fi follow-up imaging an' use of ultrasound or MRI in equivocal or pregnant patientsDis section review when to repeat imaging, how clinical evolution guide modality choice, an' di roles of ultrasound an' MRI in equivocal, pediatric, an' pregnant patients while balancin' diagnostic yield, radiation, an' contrast safety.
Clinical triggers fi repeat imagingUltrasound technique in suspected appendicitisMRI protocols in pregnancy an' pediatricsBalancin' radiation risk an' diagnostic yieldWhen CT remain necessary in pregnancyLesson 2Antibiotic an' perioperative considerations tied to imaging findings (e.g., extent of contamination, abscess)Dis section link CT findings wid antibiotic an' perioperative plannin', includin' contamination extent, abscess burden, an' sepsis risk, an' discuss timin' of surgery, prophylaxis choices, an' duration of therapy based pon radiologic severity.
Imaging predictors of severe contaminationAbscess burden an' antibiotic spectrumTimin' of surgery afta source controlCT guidance fi postoperative prophylaxisImaging clues to resistant or atypical infectionLesson 3CT features of complicated appendicitis: perforation, phlegmon, localized abscess, free intraperitoneal air, an' small-bowel obstructionDis section review CT features of complicated appendicitis, includin' perforation, phlegmon, abscess, free air, an' small-bowel obstruction, an' discuss how to recognize subtle signs dat alter urgency an' type of intervention.
Direct an' indirect signs of perforationDistinguishin' phlegmon from abscessDetection of free intraperitoneal airSmall-bowel obstruction related to appendicitisPredictors of postoperative complicationsLesson 4Measurement an' characterization of periappendiceal abscesses: size, loculation, gas, an' adjacent bowel involvementDis section explain how to measure an' characterize periappendiceal abscesses pon CT, includin' size, loculation, gas content, an' adjacent bowel involvement, an' how dese features guide drainage feasibility, access route, an' urgency.
Standardized abscess size measurementsLoculation, septations, an' complexityGas patterns an' fistula suspicionAdjacent bowel an' organ involvementSelectin' candidates fi percutaneous drainageLesson 5Contrast-enhanced CT protocols fi acute abdomen: oral/IV contrast considerations, phases, an' low-dose techniquesDis section detail contrast-enhanced CT protocols fi acute abdomen, coverin' IV contrast timin', oral contrast indications, phase selection, an' low-dose strategies dat preserve diagnostic quality while minimizin' radiation an' contrast-related risks.
IV contrast timin' an' injection parametersRole of oral contrast in suspected appendicitisSingle versus multiphasic acquisition choicesLow-dose an' iterative reconstruction methodsManagin' contrast allergy an' renal riskLesson 6Reportin' format fi abdominal CT in acute appendicitis: concise findings, severity gradin', an' recommended next stepsDis section outline a structured CT reportin' approach fi suspected appendicitis, emphasizin' key required elements, severity gradin', clear impression statements, an' actionable recommendations dat support timely, appropriate management.
Essential elements of di CT reportStandardized severity gradin' systemsClear impression an' diagnostic certaintyActionable management recommendationsCommunicatin' critical an' unexpected findingsLesson 7Interventional radiology an' surgical decision-makin': indications fi percutaneous drainage vs. appendectomy vs. antibiotics-first strategiesDis section explain how CT findings influence selection of antibiotics alone, percutaneous drainage, or surgery, emphasizin' abscess size, sepsis, comorbidities, an' multidisciplinary discussion between radiology, surgery, an' interventional radiology teams.
CT criteria fi antibiotics-first therapyIndications fi percutaneous abscess drainageWhen urgent appendectomy is preferredImaging predictors of treatment failurePost-procedure imaging an' complication checksLesson 8Primary CT findings of acute appendicitis: appendiceal diameter, wall thickenin'/enhancement, periappendiceal fat strandin'Dis section describe primary CT signs of acute appendicitis, includin' appendiceal diameter, wall thickenin', mural enhancement, an' periappendiceal fat strandin', an' explain measurement techniques an' pitfalls dat can mimic or obscure disease.
Measurin' appendiceal diameter accuratelyAssessin' wall thickenin' an' enhancementCharacterizin' periappendiceal fat strandin'Luminal obstruction, fecalith, an' fluidCommon pitfalls an' normal variantsLesson 9CT anatomy of di right lower quadrant: appendix variants, cecum, terminal ileum, mesoappendix, an' adjacent structuresDis section review right lower quadrant anatomy pon CT, includin' cecum, terminal ileum, mesoappendix, an' vascular landmarks, an' highlight common appendix positions an' variants dat affect detection, interpretation, an' potential surgical plannin'.
Identifyin' di cecum an' ileocecal valveLocatin' di normal appendix pon CTRetrocecal an' pelvic appendix positionsMesoappendix, vessels, an' lymph nodesCongenital an' postsurgical anatomic variantsLesson 10Differentiating appendicitis from mimics: terminal ileitis, Meckel diverticulitis, Crohn disease, epiploic appendagitis, right-sided diverticulitisDis section focus pon CT features dat distinguish appendicitis from key mimics, includin' terminal ileitis, Crohn disease, Meckel diverticulitis, epiploic appendagitis, an' right-sided diverticulitis, emphasizin' wall pattern, location, an' fat changes.
Terminal ileitis versus appendicitis pon CTCrohn disease activity in di right lower quadrantCT signs of Meckel diverticulitisRecognizin' epiploic appendagitisRight-sided colonic diverticulitis features
