Thermal Index (TI)
Category Safety Parameter Term Thermal Index (TI) Definition of Thermal Index (TI) Estimate Of Potential Tissue Heating During RF Exposure Notes About Thermal Index (TI) Monitored In High Duty Cycle Sequences
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Radiographic Density
Category Image Descriptor Term Radiographic Density Definition of Radiographic Density Degree Of Blackening On Film Or Brightness On Digital Image Corresponding To Receptor Exposure Notes About Radiographic Density Inverse Of Optical Density In Digital Display
Inversion Recovery
Category Contrast Technique Term Inversion Recovery Definition of Inversion Recovery Sequence Starting With 180° Inversion Pulse To Null Specific Tissue Signal Notes About Inversion Recovery Includes STIR And FLAIR Variants
Pulsed Wave Doppler
Category Flow Imaging Term Pulsed Wave Doppler Definition of Pulsed Wave Doppler Sampled Doppler Technique That Measures Velocity At A Specific Depth Notes About Pulsed Wave Doppler Useful For Spectral Analysis With Range Resolution
Converging Collimator
Category Collimator Type Term Converging Collimator Definition of Converging Collimator Collimator That Magnifies Image For Small Field Of View Applications Notes About Converging Collimator Used For Cardiac Or Small Organ Imaging
Grid Frequency
Category Grid Specification Term Grid Frequency Definition of Grid Frequency Number Of Grid Lines Per Centimeter Affecting Moiré And Image Quality Notes About Grid Frequency Higher Frequency Preferred For Digital Systems
Lead Field
Category Physics Concept Term Lead Field Definition of Lead Field Spatial Sensitivity Pattern Of The Transducer Array To Incoming Echoes Notes About Lead Field Affects Image Formation And Artifact Susceptibility
Amniotic Fluid Index AFI
Category Obstetric Assessment Term Amniotic Fluid Index AFI Definition of Amniotic Fluid Index AFI Quantitative Estimate of Amniotic Fluid Volume Using Four-Quadrant Measurements Notes About Amniotic Fluid Index AFI Used to Detect Oligohydramnios or Polyhydramnios
Radiation Monitoring
Category Occupational Safety Term Radiation Monitoring Definition of Radiation Monitoring Use Of Area Monitors And Personal Dosimeters To Track Radiation Levels Notes About Radiation Monitoring Includes Alarms For Elevated Readings
Incoherent Imaging
Category Technique Term Incoherent Imaging Definition of Incoherent Imaging Processing That Uses Magnitude Only, Reducing Phase Artifacts Notes About Incoherent Imaging Simpler But Less Sensitive