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In clinical practice, post-test probabilities are often just estimated or even guessed. This is usually acceptable in the finding of a pathognomonic sign or symptom, in which case it is almost certain that the target condition is present; or in the absence of finding a sine qua non sign or symptom, in which case it is almost certain that the target condition is absent.
It can also be useful in assessing functional problems, where the lacrimal system appears unobstructed, and for post-operative progress. [7] [8] Advantages of DSG over dacrocystography include better functional information and a lack of injection. [9] DSG does not provide precise localisation and may not be useful in cases of complete ...
When insonation of the kidney is obscured by intestinal air, the supine scan position is combined with the lateral decubitus position with the transducer moved dorsally. Preferably, the exam is initiated in the longitudinal scan plane, parallel to the long diameter of the kidney, as the kidney is easier to distinguish. [1]
Example: Brain pathologies such as Alzheimer's disease greatly decrease brain metabolism of both glucose and oxygen in tandem. Therefore 18F-FDG PET of the brain may also be used to successfully differentiate Alzheimer's disease from other dementing processes, and also to make early diagnoses of Alzheimer's disease.
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To compare pre- and post-surgical repair of rectal outlet obstruction (obstructed defecation). [2] Specifically, defecography can differentiate between anterior and posterior rectocele. [4] Also, in external rectal prolapse that was not directly visualized during examination, this radiographic projection will demonstrate its presence.
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Positionality statements have also attracted controversy, being alternatively labeled by detractors as "research segregation", "positional piety", and "loyalty oaths". [ 11 ] [ 12 ] [ 13 ] According to critics, an author may claim moral authority through affinity with subjects, or through a confession of difference of relative privilege.