Lesson 1Doppler Basics: Colour Doppler, Power Doppler, Pulsed-Wave (PW) Doppler, Continuous-Wave (CW) OverviewThis part introduces colour, power, pulsed-wave, and continuous-wave Doppler. You will review simple blood flow principles, wrapping issues, and when to use each Doppler type in common blood vessel and heart checks.
Doppler effect and flow direction basicsColor Doppler principles and mapsPower Doppler sensitivity and usesPulsed-wave Doppler applicationsContinuous-wave Doppler indicationsLesson 2Harmonics, Compound Imaging, Speckle Reduction: When to Use and Expected ResultsThis part looks at tissue harmonic imaging, spatial compound imaging, and speckle reduction tools. You will learn when to turn on each feature, spot the changes in pictures, and avoid too much processing that causes false images.
Tissue harmonic imaging indicationsEffects of harmonics on resolution and noiseSpatial compound imaging benefitsSpeckle reduction filters and limitsBalancing detail with artifact controlLesson 3Machine Controls and Presets: Presets, Depth, Gain, Time-Gain Compensation (TGC), Dynamic Range, Focal ZonesThis part covers main machine controls like presets, depth, overall gain, TGC, dynamic range, and focal zones. You will practise using the knobs step by step to get clear, useful B-mode pictures in different situations.
Selecting and modifying exam presetsDepth and field of view adjustmentsOverall gain versus TGC shapingDynamic range and image contrastFocal zone number and placementSaving user presets and recallLesson 4Frequency Choice and Depth: Picking MHz for Belly, Pelvic, and Blood Vessel ScansThis part explains how to pick the right sending frequency for different body parts. You will connect MHz choice to depth reach, detail sharpness, and patient body type for belly, pelvic, and blood vessel ultrasound exams.
Frequency versus penetration principlesChoosing MHz for abdominal imagingFrequency choices for pelvic scanningFrequency ranges for vascular studiesAdjusting for body habitus and depthLesson 5Beam Shaping and Focus: Setting Focal Zones and Single vs Multiple Foci for Clear PicturesThis part explains beam shaping ideas and how focal zones affect side-to-side detail. You will compare one focal zone against many, understand picture speed effects, and learn practical focus spots for main organs.
Transmit and receive beamforming basicsFocal depth and lateral resolutionSingle versus multiple focal zonesFocus and frame rate trade-offsBest focus placement by anatomyLesson 6Basic Ultrasound Physics: Sound Travel, Frequency, Wavelength, Weakening, Detail Trade-OffsThis part reviews how sound waves move through body tissues, how frequency and wavelength connect, and how weakening and detail trade-offs change picture quality. You will link physics ideas straight to daily scanning decisions.
Acoustic wave properties and terminologyFrequency, period, and wavelength relationsPropagation speed in soft tissuesAttenuation, absorption, and scatteringAxial and lateral resolution trade-offsLesson 7False Images and How to Handle Them: Echoing, Shadowing, Brightening, Mirror Image, Direction Change and Ways to Lessen or Use ThemThis part reviews common ultrasound false images like echoing, shadowing, brightening, mirror image, and direction change. You will learn to spot, reduce, or purposely use these false images to boost sure diagnosis.
Reverberation and comet-tail artifactsAcoustic shadowing and its causesPosterior acoustic enhancement usesMirror image and refraction artifactsAnisotropy in tendons and nervesTechniques to reduce unwanted artifactsLesson 8Picture Quality Check Steps: Test Block/QA Basics and Quick Pre-Scan Checks on Real Patients (Preset Load, Probe Link, Gel, Sweep)This part outlines regular picture quality checks using test blocks and quick steps before scanning patients. It includes QA basics, checking presets, probe link, gel use, and sweep tests before starting diagnosis imaging.
Phantom types and QA test basicsChecking depth, gain, and resolutionVerifying probe selection and cablesGel application and contact assessmentQuick sweep for global image reviewLesson 9Doppler Settings and Improvement: PRF/Scale, Baseline, Wall Filter, Gain, Angle Effects, Sample Spot PlacementThis part focuses on improving Doppler settings, including PRF or scale, baseline, wall filter, gain, angle, and sample spot. You will practise cutting wrapping and noise while keeping true wave pattern info.
Setting PRF or scale to avoid aliasingBaseline shifts and display choicesWall filter to remove low-frequency noiseDoppler gain and noise managementInsonation angle and angle correctionSample volume size and placementLesson 10Probe Types and Build: Linear, Curved (Convex), Phased Array, Inner Cavity; Size and Clinic UsesThis part explains how to choose and use linear, curved, phased array, and inner cavity probes. Focus is on size, frequency range, build basics, and matching each probe type to specific clinic needs.
Piezoelectric elements and housingLinear array footprint and indicationsCurved array for abdominal and OB usePhased array for cardiac and intercostalEndocavitary probes and safetyProbe care, handling, and damage signs
