Abstract
The purpose of this study was to develop a multi-shot dual-echo breathhold fast spin echo technique (DFSE) and compare it with conventional spin echo (T2SE) for T2-weighted MR imaging of liver lesions. The DFSE acquisition (EffTE1/EffTE2/TR = 66/143/2100 ms) imaged 5 sections per 17 s breathhold. T2SE imaging (TE1/TE2/TR = 60/120/2500 ms) required 16:55 (min:s) for 14 sections. Both techniques used a receive-only phased-array abdominal multicoil and provided 192 x 256 effective resolution. The results showed first and second echo relative DFSE/T2SE contrast values for 27 representative lesions (15 consecutive patients) were 1.08 ± 0.05 and 1.16 ± 0.09 (mean ± STD mean), respectively. Corresponding CNR values were 1.12 ± 0.09 and 0.97 ± 0.12. Overall DFSE was comparable-to-superior to T2SE for lesion sizing and image artifact. DFSE lesion detection was inferior to T2SE's in several patient studies because of decreased conspicuity of lesions located near multicoil edges and because of poor breathhold-to-breathhold reproducibility and lack of breathholding. However both DFSE (and T2SE) provided lesion detection rated to be of diagnostic quality for all patient studies. In conclusion, we found that DFSE provides diagnostically useful dual-echo T2-weighted MR liver images in a greatly decreased acquisition time. (C) 2000 Elsevier Science Inc.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 117-124 |
| Number of pages | 8 |
| Journal | Magnetic Resonance Imaging |
| Volume | 18 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2000 |
Fingerprint
Keywords
- Comparative studies
- Half- Fourier imaging
- Liver neoplasms
- Pulse sequences
- Rapid imaging
ASJC Scopus subject areas
- Biophysics
- Clinical Biochemistry
- Structural Biology
- Radiology Nuclear Medicine and imaging
- Condensed Matter Physics
Cite this
Dual-echo breathhold T2-weighted fast spin echo MR imaging of liver lesions. / Rydberg, John N.; Tervonen, Osmo A.; Rydberg, David B.; Lomas, David J.; Ehman, Richard Lorne; Riederer, Stephen J.
In: Magnetic Resonance Imaging, Vol. 18, No. 2, 02.2000, p. 117-124.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dual-echo breathhold T2-weighted fast spin echo MR imaging of liver lesions
AU - Rydberg, John N.
AU - Tervonen, Osmo A.
AU - Rydberg, David B.
AU - Lomas, David J.
AU - Ehman, Richard Lorne
AU - Riederer, Stephen J
PY - 2000/2
Y1 - 2000/2
N2 - The purpose of this study was to develop a multi-shot dual-echo breathhold fast spin echo technique (DFSE) and compare it with conventional spin echo (T2SE) for T2-weighted MR imaging of liver lesions. The DFSE acquisition (EffTE1/EffTE2/TR = 66/143/2100 ms) imaged 5 sections per 17 s breathhold. T2SE imaging (TE1/TE2/TR = 60/120/2500 ms) required 16:55 (min:s) for 14 sections. Both techniques used a receive-only phased-array abdominal multicoil and provided 192 x 256 effective resolution. The results showed first and second echo relative DFSE/T2SE contrast values for 27 representative lesions (15 consecutive patients) were 1.08 ± 0.05 and 1.16 ± 0.09 (mean ± STD mean), respectively. Corresponding CNR values were 1.12 ± 0.09 and 0.97 ± 0.12. Overall DFSE was comparable-to-superior to T2SE for lesion sizing and image artifact. DFSE lesion detection was inferior to T2SE's in several patient studies because of decreased conspicuity of lesions located near multicoil edges and because of poor breathhold-to-breathhold reproducibility and lack of breathholding. However both DFSE (and T2SE) provided lesion detection rated to be of diagnostic quality for all patient studies. In conclusion, we found that DFSE provides diagnostically useful dual-echo T2-weighted MR liver images in a greatly decreased acquisition time. (C) 2000 Elsevier Science Inc.
AB - The purpose of this study was to develop a multi-shot dual-echo breathhold fast spin echo technique (DFSE) and compare it with conventional spin echo (T2SE) for T2-weighted MR imaging of liver lesions. The DFSE acquisition (EffTE1/EffTE2/TR = 66/143/2100 ms) imaged 5 sections per 17 s breathhold. T2SE imaging (TE1/TE2/TR = 60/120/2500 ms) required 16:55 (min:s) for 14 sections. Both techniques used a receive-only phased-array abdominal multicoil and provided 192 x 256 effective resolution. The results showed first and second echo relative DFSE/T2SE contrast values for 27 representative lesions (15 consecutive patients) were 1.08 ± 0.05 and 1.16 ± 0.09 (mean ± STD mean), respectively. Corresponding CNR values were 1.12 ± 0.09 and 0.97 ± 0.12. Overall DFSE was comparable-to-superior to T2SE for lesion sizing and image artifact. DFSE lesion detection was inferior to T2SE's in several patient studies because of decreased conspicuity of lesions located near multicoil edges and because of poor breathhold-to-breathhold reproducibility and lack of breathholding. However both DFSE (and T2SE) provided lesion detection rated to be of diagnostic quality for all patient studies. In conclusion, we found that DFSE provides diagnostically useful dual-echo T2-weighted MR liver images in a greatly decreased acquisition time. (C) 2000 Elsevier Science Inc.
KW - Comparative studies
KW - Half- Fourier imaging
KW - Liver neoplasms
KW - Pulse sequences
KW - Rapid imaging
UR - http://www.scopus.com/inward/record.url?scp=0034022502&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034022502&partnerID=8YFLogxK
U2 - 10.1016/S0730-725X(99)00120-4
DO - 10.1016/S0730-725X(99)00120-4
M3 - Article
VL - 18
SP - 117
EP - 124
JO - Magnetic Resonance Imaging
JF - Magnetic Resonance Imaging
SN - 0730-725X
IS - 2
ER -