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...Basic radiographic procedures the gpt method g patrick thomas jr dc dacbr copyright po box blue springs mo gptdacbr juno com table of contents chapter introduction equipment spine upper extremity lower chest and abdomen terminology ap pa lateral anterior posterior radiographs are taken with patient facing x ray tube so that beam enters their side exits posteriorly films performed while faces away from goes in comes out ones which stands sideways to they can be done either s left or right next film if is placed it called a laterals oblique halfway between will rotated about degrees frontal nomenclature for gets very confusing closer than then view furthermore turned obliquely an projection lumbar patients against abbreviated lpo rao other possibilities include lao rpo not easiest system learn use but descriptive at any rate we stuck by tradition get used ffd focal distance describes source spot surface also known as image sid this measurement effects magnification distortion intensity h...