What is focal film distance?

The distance in inches between the focal spot of the x-ray tube, or the radiation source, and the film.

What is source image distance?

The source image receptor distance (SID), is the distance of the tube from the image receptor, affecting magnification. The greater the SID, the less magnification the image will suffer.

What is OFD in radiology?

OFD – Object-to-Film Distance – is the distance between the radiation side of the test object and the film surface, measured along the central axis of the radiation beam. The other distance used in radiographic testing is the source-to-object distance, which in the superseded BS EN 1435: 1997 was denoted by f.

What is the Bucky factor?

The Bucky factor is the ratio of radiation on the anti-scatter grid to the transmitted radiation. Hence, the Bucky factor reflects the increased radiation dose required from anti-scatter grid use, as any increase in mAs proportionally increases dose. The Bucky factor changes with: change in kVp.

What is magnification in radiography?

Magnification radiography is the purposeful production of an image larger than the object being studied. This technique can be utilized to image detail that is not resolvable by normal means.

What is Sid and OID in radiography?

Three terms are used to describe positioning: source-object distance (SOD, where the object represents the patient); object-image distance (OID, where the image is the detector); and source-image distance (SID). As the patient is brought closer to the detector (decrease OID), magnification decreases.

What is OFD medical term?

(OFD) (ōrō-fāshē-ō-diji-tăl sindrōm) Inherited syndrome, lethal in males, with varying combinations of defects of oral cavity, face, and hands, including lobulated or bifid tongue, cleft or pseudocleft palate, tongue tumors, and missing or malpositioned teeth. Synonym(s): orodigitofacial dysostosis.

What is SFD and OFD in radiography?

SFD – Source-to-Film Distance – is the distance between the radiation source and the film in radiographic testing, as measured in the direction of the beam. OFD – Object-to-Film Distance – is the distance between the radiation side of the test object and the film surface, measured along the central axis of the radiation beam.

What is sfsfd (source to film distance)?

SFD – Source-to-Film Distance – is the distance between the radiation source and the film in radiographic testing, as measured in the direction of the beam.

What is ofofd (object to film distance)?

OFD – Object-to-Film Distance – is the distance between the radiation side of the test object and the film surface, measured along the central axis of the radiation beam.

What is the source-to-object distance in radiographic testing?

The other distance used in radiographic testing is the source-to-object distance, which in the superseded BS EN 1435: 1997 was denoted by f. It can be calculated from SFD–OFD. The SFD and OFD are two of the three factors (the third being source size) that determine the geometric unsharpness of the image.