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Appropriate use criteria by the American College of Radiology give a rating of ≥7 (usually appropriate) for non-contrast MRI for the following conditions: Acute non-localized pain in the right upper quadrant or right lower quadrant (in concurrent fever and leukocytosis) [3] Acute pelvic pain when a non-gynecological cause is suspected [3]
A contrast agent usually shortens, but in some instances increases, the value of T1 of nearby water protons thereby altering the contrast in the image. Most clinically used MRI contrast agents work by shortening the T1 relaxation time of protons inside tissues via interactions with the nearby contrast agent.
Pelvimetry is the measurement of the female pelvis. [1] It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal. However, clinical evidence indicate that all pregnant women should be allowed a trial of labor regardless of pelvimetry ...
Gynoroentgenology is the abbreviation of gynecological roentgenology.It is the radiologic imaging of the gynecologic parts of the female human body in order to make a radiologic diagnosis of a gynecologic disease.
Iodinated contrast contains iodine.It is the main type of radiocontrast used for intravenous administration.Iodine has a particular advantage as a contrast agent for radiography because its innermost electron ("k-shell") binding energy is 33.2 keV, similar to the average energy of x-rays used in diagnostic radiography.
However, a large rectocele that retains contrast medium may hide a cul-de-sac hernia. [3] Cul-de-sac hernia (peritoneocele / omentocele) may appear on fluoroscopic defecography as an un-opacified mass which deforms the anterior border of the rectum and the posterior border of the vagina, with widening of the recto-vaginal space in between. [ 1 ]
Abdominal imaging is associated with many potential uses for the different phases of contrast CT.The majority of abdominal and pelvic CT's can be performed using a single-phase, but the evaluation of some tumor types (hepatic/pancreatic/renal), the urinary collecting system, and trauma patients among others, may be best performed with multiple phases.
MRI is widely used in hospitals and clinics for medical diagnosis, staging and follow-up of disease. Compared to CT, MRI provides better contrast in images of soft tissues, e.g. in the brain or abdomen. However, it may be perceived as less comfortable by patients, due to the usually longer and louder measurements with the subject in a long ...