Abstract:Negative oral contrast material should be given before performing a MRCP to provide non-superimposed visualization of the bile and pancreatic ducts. There is no negative influence of the oral contrast material on the diameter of the ducts.
“…3,5 Although several studies have shown the effi cacy of the agents, many were not reported in English. 3,4,[6][7][8][9][10] Therefore, their usage is not worldwide.…”
“…3,5 Although several studies have shown the effi cacy of the agents, many were not reported in English. 3,4,[6][7][8][9][10] Therefore, their usage is not worldwide.…”
“…The majority of publications (n = 18) studied MRCP protocols with and without the use of signal suppressors (certified products [n = 9] ( 9 , 10 , 16 – 18 , 21 , 25 , 26 , 30 ), fruit juices/beverages [n = 7] ( 11 , 13 – 15 , 21 , 28 , 29 ), pineapple juice in combination with non-absorbable gadolinium-chelate [n = 2] ( 22 , 24 ); Supplementary Table 1). Four compared certified agents to other products (fruit juices/beverages [n = 2] ( 21 , 31 ) or other certified agents [n = 2] ( 26 , 32 )).…”
Section: Resultsmentioning
confidence: 99%
“…To avoid this problem in advance, a reduction—or better yet, an elimination—of fluid signal from the upper GI tract is desirable. Apart from fasting prior to the examination, orally administered (negative) contrast agents with a strong T2 shortening effect allow a suppression of high intensity fluid signal and are commonly used for patient preparation ( 8 , 9 ). Fig.…”
BackgroundOrally administered substances which suppress signals from gastrointestinal fluid can be used to enhance image quality in magnetic resonance cholangiopancreatography (MRCP). In daily practice, the available substances range from commercial products to regular viands such as fruit juices.PurposeTo provide an overview on the significance of and the substances used as gastrointestinal fluid signal suppressors in MRCP.Material and MethodsA systematic review of the existing literature was performed to evaluate the efficacy and efficiency of oral T2-signal suppressors in MRCP.ResultsTwenty-five publications on 16 different oral contrast media were identified. The most commonly used substances were ferumoxsil, ferric ammonium citrate, and pineapple juice. Twenty-three out of 25 publications supported the use of oral signal suppressors in MRCP. Advantages of oral signal suppressors include improved visualization of the pancreatobiliary ductal system, increased help with differential diagnoses, and higher detection rates of relevant diagnoses due to a reduction of overlaying signals.ConclusionThe application of oral substances for gastrointestinal signal suppression in MRCP is recommendable. A variety of substances are used in daily routine with good but varying effectivity and patient tolerance.
“…In MRCP, negative oral contrast agents can be given before the examination to provide non-superimposed visualization of the bile and pancreatic ducts. There is no negative influence of the oral contrast agents on the diameter of the ducts (Petersein et al 2000a).…”
Example: Figure 2.2.26 shows the 1 H spectrum of ethanol (CH3-CH2-OH). Due to the different chemical surroundings of the protons in the hydroxyl, methylene, and methyl group, the spectrum shows three different resonance lines. The ratio of the areas under the resonance lines is 1 : 2 : 3 and thereby corresponds to the number of protons in the three groups.
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