Basic Ultrasound Imaging Course

Lesson 1 • Beam Formation and Focusing

Describes near field, far field, and focal zone geometry. Connects beam shape to lateral resolution and depth performance.

Lesson 2 • Sound Wave Properties and Behavior

Covers frequency, wavelength, amplitude, and propagation speed in biological media. Establishes the physical basis for all subsequent imaging concepts.

Lesson 3 • Bioeffects and Safety Principles

Reviews thermal and mechanical bioeffects and the ALARA principle. Prepares students to apply safe scanning practices from the first clinical session.

Lesson 4 • Resolution Types and Trade-offs

Defines axial, lateral, and elevational resolution and their determinants. Guides students in selecting parameters that balance resolution against penetration.

Lesson 1 • Transducer Types and Selection

Compares linear, curvilinear, phased array, and specialty transducers. Teaches selection criteria based on target depth, anatomy, and application.

Lesson 2 • Gain, Depth, and TGC Adjustment

Explains overall gain, time-gain compensation, and depth controls. Students practice adjusting these to achieve uniform brightness across the image field.

Lesson 3 • Measurement Tools and Calipers

Introduces on-screen calipers, area tracings, and automated measurement packages. Establishes accurate measurement technique as a core clinical skill.

Lesson 4 • Focus, Zoom, and Image Optimization

Covers focal zone placement, write zoom, and read zoom functions. Connects proper focus positioning to improved lateral resolution at the region of interest.

Lesson 1 • Shadowing and Enhancement Artifacts

Explains acoustic shadowing behind calcifications and posterior enhancement behind fluid. Links these artifacts to tissue acoustic impedance differences.

Lesson 2 • Beam Width and Slice Thickness Artifacts

Covers lateral resolution limits causing beam width artifact and slice thickness artifact in cystic structures. Connects these to transducer frequency and focus settings.

Lesson 3 • Speed Displacement and Range Ambiguity

Explains errors from assumed propagation speed and range ambiguity at high depths. Teaches depth and frequency adjustments to minimize these effects.

Lesson 4 • Mirror Image and Refraction Artifacts

Identifies mirror image duplication and refraction-related misregistration. Prepares students to reposition the transducer to confirm or eliminate these artifacts.

Lesson 1 • Ergonomics and Probe Handling

Addresses posture, grip, and wrist mechanics to prevent repetitive strain injury. Establishes correct probe handling as a prerequisite for consistent image quality.

Lesson 2 • Standard Imaging Planes and Notation

Establishes sagittal, transverse, and coronal planes with screen orientation conventions. Ensures consistent image labeling across all subsequent organ-specific chapters.

Lesson 3 • Patient Preparation and Positioning

Covers fasting requirements, gel application, and patient positioning for each body region. Reduces examination failure rates caused by inadequate preparation.

Lesson 4 • Transducer Movements and Orientations

Defines sliding, rocking, rotating, and tilting maneuvers and their imaging effects. Provides the vocabulary and motor skills for systematic organ survey.

Lesson 1 • Doppler of Abdominal Vessels

Applies Doppler to the aorta, celiac axis, superior mesenteric artery, and portal vein. Identifies stenosis, thrombosis, and portal hypertension patterns.

Lesson 2 • Doppler Physics and the Doppler Equation

Derives the Doppler frequency shift equation and explains angle dependence. Provides the physical foundation for accurate velocity measurement.

Lesson 3 • Doppler in Obstetric and Pelvic Imaging

Measures umbilical artery and uterine artery indices for fetal well-being assessment. Applies color Doppler to ovarian vascularity and ectopic pregnancy evaluation.

Lesson 4 • Spectral Waveform Analysis

Interprets peak systolic velocity, end-diastolic velocity, and resistive index from spectral traces. Connects waveform morphology to vascular resistance and flow states.

Lesson 1 • Spleen and Aorta Assessment

Measures splenic size and evaluates echogenicity for splenomegaly and focal lesions. Adds aortic diameter measurement for aneurysm screening.

Lesson 2 • Liver Anatomy and Normal Sonography

Maps hepatic lobes, segments, and vascular landmarks using ultrasound. Establishes normal echogenicity and size criteria as a baseline for pathology detection.

Lesson 3 • Pancreas Sonographic Assessment

Identifies pancreatic head, body, and tail and the main pancreatic duct. Addresses scanning challenges and recognizes pancreatitis and ductal dilation.

Lesson 4 • Kidney and Urinary Tract Imaging

Covers renal cortex, medulla, sinus, and collecting system sonography. Identifies hydronephrosis, renal calculi, and cortical thinning.

Lesson 1 • First-Trimester Pregnancy Assessment

Demonstrates gestational sac, yolk sac, and embryo identification with crown-rump length measurement. Establishes viability criteria and normal developmental milestones.

Lesson 2 • Second-Trimester Biometry

Teaches biparietal diameter, head circumference, abdominal circumference, and femur length measurement. Applies these to gestational age estimation and growth assessment.

Lesson 3 • Female Pelvic Anatomy Sonography

Identifies uterus, ovaries, and adnexa in transabdominal and endovaginal views. Establishes normal size, echogenicity, and follicular appearance as baseline references.

Lesson 4 • Common Uterine and Ovarian Pathology

Covers fibroids, endometrial thickening, and ovarian cysts with their sonographic features. Connects imaging findings to clinical presentations for appropriate referral.

Lesson 1 • Thyroid and Neck Structure Imaging

Performs thyroid volume measurement and nodule characterization using standardized criteria. Identifies parathyroid adenomas, cervical lymphadenopathy, and salivary gland pathology.

Lesson 2 • Superficial Mass Characterization

Evaluates lipomas, sebaceous cysts, lymph nodes, and vascular lesions using grayscale and Doppler. Applies size, shape, echogenicity, and vascularity criteria for characterization.

Lesson 3 • Muscle and Joint Evaluation

Covers muscle strain grading, hematoma identification, and joint effusion detection. Connects dynamic scanning to functional assessment of joint structures.

Lesson 4 • Normal Musculoskeletal Tissue Sonoanatomy

Describes the fibrillar pattern of tendons, pennate architecture of muscles, and fascicular nerve appearance. Establishes normal echogenicity benchmarks for pathology comparison.