Fundamental Studies of Oral Contrast Agents for MR : Comparison of Manganese Agent and Iron Agent

Fujita, Osamu; Hiraishi, Kumiko; Suginobu, Yoshito; Takeuchi, Masayasu; Narabayashi, Isamu

doi:10.6009/jjrt.kj00003109484

Cited by 3 publications

(9 citation statements)

References 2 publications

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“…This may have been caused by the difference of the T2-shortening effects between manganese and ferric ions. 12 That of the manganese ion is superior to that of the ferric ion. 12 The T1 and T2 relaxation times of the manganese chloride aqueous solution, which corresponds to the component of MCT, at 0.58 T are 111 and 24 ms, respectively.…”

Section: Discussionmentioning

confidence: 98%

“…12 That of the manganese ion is superior to that of the ferric ion. 12 The T1 and T2 relaxation times of the manganese chloride aqueous solution, which corresponds to the component of MCT, at 0.58 T are 111 and 24 ms, respectively. 13 Those of FAC at six times the normal dose at 0.58 T are 73 and 63 ms, respectively.…”

Section: Discussionmentioning

confidence: 98%

“…13 Those of FAC at six times the normal dose at 0.58 T are 73 and 63 ms, respectively. 12 Therefore, the T2-shortening effect of MCT is stronger than that of FAC at the concentration used; this likely resulted in the superior MRCP image quality.…”

Section: Discussionmentioning

confidence: 99%

“…It contains manganese ion that can indicate a strong T2-shortening effect. 3,[12][13][14] Originally a packaged liquid, it can be used at the prescribed concentration.…”

Section: Introductionmentioning

confidence: 99%

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Prospective comparative study of negative oral contrast agents for magnetic resonance cholangiopancreatography

et al. 2010

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

“…It contains manganese ion that can indicate a strong T2-shortening effect. 3,[12][13][14] Originally a packaged liquid, it can be used at the prescribed concentration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prospective comparative study of negative oral contrast agents for magnetic resonance cholangiopancreatography

et al. 2010

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“…10,11,13,14 Another agent, manganese chloride tetrahydrate (Bothdel Oral Solution 10; Kyowa Hakko Kirin, Tokyo, Japan), which has a stronger T 2 -shortening effect than ferric ion, has recently been approved. 17 Otherwise, a number of negative oral contrast agents are used throughout the world. 18 The detectability of juxtapapillary diverticulum with 3D-trueFISP-MRCP can differ in some degree depending on the T 2 and T 1 relaxation times of each agent, which should be evaluated in the future.…”

Section: Discussionmentioning

confidence: 99%

Defining juxtapapillary diverticulum with 3D segmented trueFISP MRCP: comparison with conventional MRCP sequences with an oral negative contrast agent

et al. 2009

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Kinetic MRI using high-speed sequence to evaluate swallowing

Honda

2003

Oral Radiol.

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Objective: The aim of the present study was to evaluate the ability of high-speed magnetic resonance imaging (MRI) to dynamically capture images during the swallowing process and compare the results with videofluorography.Methods : Ten subjects underwent both videofluorography and kinetic MRI, which was used in a high-speed sequence mode known as "turbo-fast low-angle shot (turbo-FLASH)" using prune extract (Miki prune| : Miki Corporation) as the contrast medium. Three radiologists assessed 18 agreed-upon items in the kinetic MR images with respect to the oral and pharyngeal phases.Results: Kinetic MRI provided high-quality images of the direct visualization of the soft tissue during swallowing. In the oral phase, the motion of the lip, tongue, and soft palate and keeping of the contrast medium were scored higher than the equivalent videofluorographic images. The motion of the mandible and the transport to the dorsum of the tongue were evaluated as approximately the same between the two methods, and the import of the contrast medium to the oral cavity, the transport to the pharynx, and the keeping of the contr~ist medium were inferior to the equivalent videofluorographic images. In the pharyngeal phase, the motion of the soft palate and the tongue base were depicted appreximately the same as in the videofluorographic images. The hyoid bone, the elevating and closing of the larynx, the wave of the pharynx, the opening of the pharyngo-esophageal segment, and the passage and keeping of the contrast medium were depicted less clearly than in videofluorography.Conclusions: Despite some limitations, high-speed kinetic MRI is a promising tool for evaluating swallowing features, as it directly provides anatomical and functional information during the entire course of swallowing using prune extract as the contrast medium.

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Fundamental Studies of Oral Contrast Agents for MR : Comparison of Manganese Agent and Iron Agent

Cited by 3 publications

References 2 publications

Prospective comparative study of negative oral contrast agents for magnetic resonance cholangiopancreatography

Prospective comparative study of negative oral contrast agents for magnetic resonance cholangiopancreatography

Defining juxtapapillary diverticulum with 3D segmented trueFISP MRCP: comparison with conventional MRCP sequences with an oral negative contrast agent

Kinetic MRI using high-speed sequence to evaluate swallowing

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