〖医学〗牙科放射线学--口腔數位影像失誤教材-课件.ppt

牙科放射線學;Identify and classify oral digital image artifacts Know how to eliminate oral digital image artifacts;Photostimulable phosphor storage plate (PSP) system ;PSP sensor plates ;PSP sensor plate ;A black box used to protect the sensor plate from room light ;Teeth of both jaws ground down until smooth a plastic tube was inserted into the smaller jaw ;Conventional occlusal film ;Double-sided tape ;;A;Repeated X-ray exposure of the same intraoral sensor plate ;Image obtained was too bright due to delayed sensor plate scanning ;Bending of the intraoral sensor plate within the mouth ;Scanning Machine Errors;Image obtained was too bright despite scanning with optimal conditions and procedures ;Image obtained was too bright despite scanning with optimal conditions and procedures ;A;Uneven brightness of an extraoral image after scanning ;;B;After the scanning of two different intraoral sensor plates in two different slots of the scanning machine, the two resulting images was overlapped ;Only half of the intraoral image was displayed after scanning ;Sensor Errors;A;;;;Miscellaneous Errors;Normal orientation of cassette within cassette holder;Opposite side of the cassette was wrongly placed facing the X-ray tube ;Opposite side of the cassette was wrongly placed facing the X-ray tube ;Ref. 3;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine ;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine ;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine ;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine ;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine ;The cassette was incorrectly placed upside down within the cassette holder of the X-ray machine then scanned upside down;The cassette was incorrectly placed upside down within the cassette holder of the