Abstract
Purpose: To show the feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography and to determine the optimal velocity encoding (VENC) value. Materials and methods: Sixteen healthy volunteers underwent MRI study using a 1.5-T clinical unit and a 32-channel body array coil. For each volunteer, images were obtained using the following seven respiratory-triggered sequences: (1) balanced magnetic resonance cholangiopancreatography without motion-sensitized driven-equilibrium, and (2)-(7) balanced magnetic resonance cholangiopancreatography with motion-sensitized driven-equilibrium, with VENC. =. 1, 3, 5, 7, 9 and ∞. cm/s for the x-, y-, and z-directions, respectively. Quantitative evaluation was obtained by measuring the maximum signal intensity of the common hepatic duct, portal vein, liver tissue including visible peripheral vessels, and liver tissue excluding visible peripheral vessels that were evaluated. We compared the contrast ratios of portal vein/common hepatic duct, liver tissue including visible peripheral vessels/common hepatic duct and liver tissue excluding visible peripheral vessels/common hepatic duct among the five finite sequences (VENC. =. 1, 3, 5, 7, and 9. cm/s). Statistical comparisons were performed using the t-test for paired data with the Bonferroni correction. Results: Suppression of blood vessel signals was achieved with motion-sensitized driven-equilibrium sequences. We found the optimal VENC values to be either 3 or 5. cm/s with the best suppression of relative vessel signals to bile ducts. At a lower VENC value (1. cm/s), the bile duct signal was reduced, presumably due to minimal biliary flow. Conclusion: The feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography was suggested. The optimal VENC value was considered to be either 3 or 5. cm/s. The clinical usefulness of this new magnetic resonance cholangiopancreatography sequence needs to be verified by further studies.
| Original language | English |
|---|---|
| Pages (from-to) | 1219-1223 |
| Number of pages | 5 |
| Journal | Magnetic Resonance Imaging |
| Volume | 33 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Dec 2015 |
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All Science Journal Classification (ASJC) codes
- Biophysics
- Biomedical Engineering
- Radiology Nuclear Medicine and imaging
Cite this
Balanced MR cholangiopancreatography with motion-sensitized driven-equilibrium (MSDE) preparation : Feasibility and optimization of imaging parameters. / Nakayama, Tomohiro; Nishie, Akihiro; Yoshiura, Takashi; Asayama, Yoshiki; Ishigami, Kousei; Kakihara, Daisuke; Obara, Makoto; Honda, Hiroshi.
In: Magnetic Resonance Imaging, Vol. 33, No. 10, 12.2015, p. 1219-1223.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Balanced MR cholangiopancreatography with motion-sensitized driven-equilibrium (MSDE) preparation
T2 - Feasibility and optimization of imaging parameters
AU - Nakayama, Tomohiro
AU - Nishie, Akihiro
AU - Yoshiura, Takashi
AU - Asayama, Yoshiki
AU - Ishigami, Kousei
AU - Kakihara, Daisuke
AU - Obara, Makoto
AU - Honda, Hiroshi
PY - 2015/12
Y1 - 2015/12
N2 - Purpose: To show the feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography and to determine the optimal velocity encoding (VENC) value. Materials and methods: Sixteen healthy volunteers underwent MRI study using a 1.5-T clinical unit and a 32-channel body array coil. For each volunteer, images were obtained using the following seven respiratory-triggered sequences: (1) balanced magnetic resonance cholangiopancreatography without motion-sensitized driven-equilibrium, and (2)-(7) balanced magnetic resonance cholangiopancreatography with motion-sensitized driven-equilibrium, with VENC. =. 1, 3, 5, 7, 9 and ∞. cm/s for the x-, y-, and z-directions, respectively. Quantitative evaluation was obtained by measuring the maximum signal intensity of the common hepatic duct, portal vein, liver tissue including visible peripheral vessels, and liver tissue excluding visible peripheral vessels that were evaluated. We compared the contrast ratios of portal vein/common hepatic duct, liver tissue including visible peripheral vessels/common hepatic duct and liver tissue excluding visible peripheral vessels/common hepatic duct among the five finite sequences (VENC. =. 1, 3, 5, 7, and 9. cm/s). Statistical comparisons were performed using the t-test for paired data with the Bonferroni correction. Results: Suppression of blood vessel signals was achieved with motion-sensitized driven-equilibrium sequences. We found the optimal VENC values to be either 3 or 5. cm/s with the best suppression of relative vessel signals to bile ducts. At a lower VENC value (1. cm/s), the bile duct signal was reduced, presumably due to minimal biliary flow. Conclusion: The feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography was suggested. The optimal VENC value was considered to be either 3 or 5. cm/s. The clinical usefulness of this new magnetic resonance cholangiopancreatography sequence needs to be verified by further studies.
AB - Purpose: To show the feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography and to determine the optimal velocity encoding (VENC) value. Materials and methods: Sixteen healthy volunteers underwent MRI study using a 1.5-T clinical unit and a 32-channel body array coil. For each volunteer, images were obtained using the following seven respiratory-triggered sequences: (1) balanced magnetic resonance cholangiopancreatography without motion-sensitized driven-equilibrium, and (2)-(7) balanced magnetic resonance cholangiopancreatography with motion-sensitized driven-equilibrium, with VENC. =. 1, 3, 5, 7, 9 and ∞. cm/s for the x-, y-, and z-directions, respectively. Quantitative evaluation was obtained by measuring the maximum signal intensity of the common hepatic duct, portal vein, liver tissue including visible peripheral vessels, and liver tissue excluding visible peripheral vessels that were evaluated. We compared the contrast ratios of portal vein/common hepatic duct, liver tissue including visible peripheral vessels/common hepatic duct and liver tissue excluding visible peripheral vessels/common hepatic duct among the five finite sequences (VENC. =. 1, 3, 5, 7, and 9. cm/s). Statistical comparisons were performed using the t-test for paired data with the Bonferroni correction. Results: Suppression of blood vessel signals was achieved with motion-sensitized driven-equilibrium sequences. We found the optimal VENC values to be either 3 or 5. cm/s with the best suppression of relative vessel signals to bile ducts. At a lower VENC value (1. cm/s), the bile duct signal was reduced, presumably due to minimal biliary flow. Conclusion: The feasibility of motion-sensitized driven-equilibrium-balanced magnetic resonance cholangiopancreatography was suggested. The optimal VENC value was considered to be either 3 or 5. cm/s. The clinical usefulness of this new magnetic resonance cholangiopancreatography sequence needs to be verified by further studies.
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UR - http://www.scopus.com/inward/citedby.url?scp=84947486313&partnerID=8YFLogxK
U2 - 10.1016/j.mri.2015.07.003
DO - 10.1016/j.mri.2015.07.003
M3 - Article
C2 - 26234501
AN - SCOPUS:84947486313
VL - 33
SP - 1219
EP - 1223
JO - Magnetic Resonance Imaging
JF - Magnetic Resonance Imaging
SN - 0730-725X
IS - 10
ER -