Image Receptor Types

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Image Receptor Types by Mind Map: Image Receptor Types

1. CR

1.1. PSP (Photostiulable Phospor)

1.1.1. X-ray exposure absorbed by phosphor atoms

1.1.1.1. Solid-state laser scans entire IP

1.1.1.1.1. Light directs to photodetector

2. DR

2.1. FPD (Flat Panel Detector)

2.1.1. X-ray exposure captured by DEL (fill factor) (80%

2.1.1.1. Only exposed area of detector is "read"

2.1.1.1.1. Exit energy (image forming signal) captured for conversion to e- signal

2.1.2. Indirect

2.1.2.1. Exit beam absorbed by scintillator

2.1.2.1.1. Light picked up by photodetector which generates equal electric charge

2.1.2.2. Charge-Coupled Device (CCD)

2.1.2.2.1. Light converted to electric charge by capacitors---> released to ADC

2.1.2.3. Complementary Metal-Oxide Semiconductor (CMOS0

2.1.2.3.1. Not as sensitive to light as CCD

2.1.3. Direct

2.1.3.1. TFT holds electrical charge, then quickly releases to ADC

2.1.3.1.1. No light involved= improved spatial resolution