
RDMS-AB Exam Information and Outline
Registered Diagnostic Medical Sonographer - Abdomen
RDMS-AB Exam Syllabus & Study Guide
Before you start practicing with our exam simulator, it is essential to understand the official RDMS-AB exam objectives. This course outline serves as your roadmap, breaking down exactly which technical domains and skills will be tested. By reviewing the syllabus, you can identify your strengths and focus your study time on the areas where you need the most improvement.
The information below reflects the latest 2026 course contents as defined by APCA. We provide this detailed breakdown to help you align your preparation with the actual exam format, ensuring there are no surprises on test day. Use this outline as a checklist to track your progress as you move through our practice question banks.
Below are complete topics detail with latest syllabus and course outline, that will help you good knowledge about exam objectives and topics that you have to prepare. These contents are covered in questions and answers pool of exam.
Anatomy, Perfusion, and Function
- Assess physical characteristics of anatomic structures (normal anatomy, anatomic variants, congenital anomalies)
- Biliary system
- Breast
- Chest
- Liver
- Neck (including: thyroid, parathyroid, salivary glands, lymph nodes)
- Pancreas
- Penis
- Peritoneal cavity (including: stomach, bowel, appendix)
- Prostate
- Retroperitoneum (including: great vessels & branches)
- Scrotum
- Spleen
- Superficial structures (for example: abdominal wall & subcutaneous tissue)
- Urinary system
- Knowledge of normal anatomy, anatomic regions, and anatomic variants
- Knowledge of sonographic appearance of anatomic structures
- Ability to recognize and utilize anatomic landmarks in obtaining and documenting diagnostic images
- Ability to recognize and apply proper scan technique in obtaining and documenting diagnostic images
- Ability to recognize, evaluate and document congenital anomalies
- Assess physical characteristics of anatomic structures
- Assess perfusion and function of anatomic structures
- Assess anatomic structures for pathology
- Assess anatomic structures for vascular abnormalities
- Assess anatomic structures for traumarelated abnormalities
- Assess aspects related to postoperative anatomy
- Apply concepts of equipment/image optimization
- Apply concepts of imaging artifacts
- Incorporate clinical data with performed study
- Incorporate clinical standard/guidelines with performed study
- Obtain accurate measurements
- Assist/support during procedures
- Assess perfusion and function of anatomic structures
- Biliary system
- Chest
- Liver
- Neck (including: thyroid, parathyroid, salivary glands, lymph nodes)
- Penis
- Peritoneal cavity (including: stomach, bowel, appendix)
- Prostate
- Retroperitoneum (including: great vessels & branches)
- Scrotum
- Spleen
- Superficial structures (for example: abdominal wall & subcutaneous tissue)
- Urinary system
- Ability to recognize appearance of normal vascular flow patterns
- Ability to recognize and utilize anatomic landmarks in evaluating and documenting perfusion and function
- Ability to recognize and apply proper scan technique in evaluating and documenting perfusion and function
- Knowledge of normal vascular anatomy and hemodynamics
Pathology, Vascular Abnormalities, Trauma, and Postoperative Anatomy
- Assess anatomic structures for pathology
- Abdominal wall for hernia (for example: ventral, inguinal, incisional)
- Adrenal glands for masses, hemorrhage, etc.
- Biliary system for infection, masses, metastatic disease, obstructions, etc.
- Breast for infection, abscess, masses, etc.
- Chest for fluid, masses, etc.
- Gastrointestinal system for masses, obstruction, pyloric stenosis, intussusception, etc.
- Joints for abnormalities (for example: fluid)
- Liver for hepatitis, fatty infiltration, cirrhosis, neoplasm, abscess, cyst, etc.
- Neck (including: thyroid, parathyroid, salivary glands, lymph nodes) for diffuse parenchymal disease, inflammation, masses, etc.
- Pancreas for infection, masses, obstruction, etc.
- Penis for abnormalities
- Peritoneal cavity (including: stomach, bowel, appendix) for fluid
- Popliteal fossa for abnormalities (for example: masses, fluid)
- Prostate for parenchymal disease or masses (for example: benign prostatic hypertrophy)
- Retroperitoneum (including: great vessels & branches) for fibrosis, lymphadenopathy, etc.
- Scrotum for fluid, hernia, masses, infection, parenchymal disease, etc.
- Spleen for splenomegaly, parenchymal changes, masses, etc.
- Superficial structures (for example: abdominal wall, subcutaneous tissue) for foreign bodies, infection, fluid, masses, etc.
- Urinary system for masses, obstruction, parenchymal disease, infection, etc
- Knowledge of etiology/pathophysiology of abnormal perfusion and function
- Ability to recognize ultrasound findings related to abnormalities of anatomy, perfusion, and function in obtaining and documenting diagnostic images
- Ability to recognize and apply proper scan technique in evaluating and documenting pathology
- Ability to recognize foreign bodies, infection, fluid, masses, etc.
- Knowledge of hernia types and their sonographic appearance
- Assess anatomic structures for vascular abnormalities
- Liver for Budd-Chiari syndrome, arteriovenous fistula, portal vein thrombosis, collateralization, etc.
- Knowledge of anatomic and vascular changes associated with vascular abnormities
- Knowledge of sonographic findings associated with vascular abnormalities
- Ability to recognize and apply proper scan technique in evaluating and documenting vascular abnormalities
- Retroperitoneum (including: great vessels and branches) for aneurysm, dissection, thrombus, etc.
- Scrotum for torsion, varicocele, etc.
- Spleen for infarction, hemangiomas, etc.
- Urinary system for renal artery stenosis, arteriovenous fistulas, etc
- Assess anatomic structures for trauma-related abnormalities
- Hepatic system • Knowledge of sonographic appearance as a result of trauma
- Ability to rapidly prioritize and evaluate sonographic findings due to trauma
- Ability to perform focused assessment for free fluid following a traumatic event
- Ability to recognize and apply proper scan technique in evaluating and documenting trauma
- Penis
- Scrotum
- Spleen
- Superficial structures (for example: abdominal wall, subcutaneous tissue)
- Urinary system
- Focused assessment for free fluid related to traumatic events
- Assess aspects related to postoperative anatomy
- Anatomy of transplanted organs
- Knowledge of hemodynamics of transplanted organs
- Knowledge of common causes of transplant failure
- Ability to recognize signs of rejection
- Perfusion and function of transplanted organs
- Complications related to organ transplants
- Abnormalities in postsurgical anatomy
- Ability to adjust scan technique based on patient condition and surgical history
- Ability to distinguish characteristics of common anastomosis sites
- Ability to recognize fluid collections
- Ability to interpret and integrate surgical history with sonographic findings
- Knowledge of surgical procedures used in organ transplant
- Knowledge of surgical zones of the neck
- Ability to evaluate and document findings within surgical zones of the neck
- Knowledge of patterns and sonographic appearance of disease recurrence
- Ability to evaluate transjugular intrahepatic portosystemic shunts (TIPS)
- Ability to recognize and apply proper scan technique in evaluating and documenting postsurgical findings
- Abnormalities in postsurgical breast
- Abnormalities (for example: recurrent disease, lymphadenopathy) in postsurgical neck
- Implanted medical devices (for example: transjugular intrahepatic portosystemic shunt [TIPS])
Abdominal Physics
- Apply concepts of equipment/image optimization
- Use appropriate transducer (for example: curvilinear, linear, phased array)
- Ability to select the appropriate transducer and machine presets based on body habitus
- Ability to use acoustic windows creatively to optimize visualization
- Ability to adjust machine settings to maximize penetration while minimizing resolution loss
- Knowledge of appropriate application of Doppler techniques
- Ability to manipulate color, power, and pulsed wave settings to accurately display and measure blood flow
- Use two-dimensional, real-time, gray-scale imaging (for example: B-mode, compound, harmonic)
- Use Doppler (for example: color, power, pulsed wave)
- Apply concepts of imaging artifacts
- Assess artifacts of gray-scale imaging (for example: shadowing, resonance, comet tail)
- Ability to recognize artifacts and correlate them with anatomy and pathology
- Ability to manipulate machine settings to enhance or minimize artifacts
- Assess artifacts of Doppler imaging (for example: twinkle, spectral broadening)
Clinical Care, Practice, and Quality Assurance
- Incorporate clinical data with performed study
- Assess indications for examination requested
- Knowledge of appropriate indications and contraindications for a specific exam and/or procedure
- Knowledge of potential effects of patient medications on an exam or procedure
- Knowledge of lab values relevant to specific examinations
- Assess relevant clinical lab values for examination being performed
- Assess relevant family history and patient signs/symptoms for examination being performed
- Correlate ultrasound findings with previous imaging results
- Ability to obtain and evaluate patient history relevant to the exam
- Ability to assimilate patient’s signs and symptoms and modify the exam/or describe the findings
- Ability to modify the exam based on information from other modalities
- Ability to localize pathology for sonographic correlation
- Ability to modify the exam based on real-time findings
- Knowledge of modalities associated with the exam being performed
- Ability to utilize resources, such as physicians, literature, or peers
- Evaluate images from other imaging modalities (for example: computed tomography, magnetic resonance imaging, nuclear medicine, x-ray)
- Incorporate clinical standard/guidelines with performed study
- Communicate effectively with the patient, physician, and others, including communication of findings that require immediate action
- Ability to communicate with patient in a professional and appropriate manner to effectively explain procedures, deal with inappropriate behavior, and engage patient cooperation
- Ability to communicate using appropriate medical terminology
- Ability to modify exam preparation, patient position, and/or image acquisition based on patient condition and/or sonographic findings
- Ability to recognize findings and/or situations that require immediate action and respond effectively
- Knowledge of appropriate patient preparation for an exam and knowledge of factors that may affect patient preparation (for example: patient history, patient condition, sequencing requirements of multiple modality exams)
- Knowledge of sonographer scope of practice and regulations regarding patient information and interactions
- Inform patient or referring practitioner of examination preparations (for example: fasting for biliary imaging)
- Maintain and protect patient confidentiality/privacy
- Modify the examination based on patient condition and/or sonographic findings
- Use multiple patient positions and scan planes to evaluate anatomic structures
- Obtain accurate measurements
- Obtain measurements of anatomic structures • Knowledge of normal measurement ranges
- Knowledge of proper techniques for measuring anatomic structures
- Knowledge of hemodynamics
- Knowledge of normal and abnormal Doppler waveforms
- Ability to analyze Doppler measurements
- Ability to distinguish artifacts from actual blood flow
- Ability to apply knowledge of measurement techniques (for example: Doppler and gray-scale)
- Obtain measurements of Doppler waveforms
- Assist/support during procedures
- Obtain consent form and patient lab results prior to the procedure
- Knowledge of sonographer's role in obtaining consent
- Ability to verify and document patient consent
- Ability to verify correct patient, side (laterality), and site
- Knowledge of contraindications for specific procedures
- Knowledge of proper safety precautions in interventional procedures
- Knowledge of equipment and materials used for a specific procedure
- Knowledge of interventional procedures and sonographer's role
- Knowledge of protocols during surgical procedures, related to the sonographer's role
- Ability to adapt protocol due to different circumstances
- Ability to optimally display the needle path and tip
- Ability to recognize implanted medical devices
- Knowledge of potential post-procedural complications
- Provide ultrasound guidance for procedures
- Evaluate for post-procedural changes/complications