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Titolo:
Characterization of focal liver lesions with half-Fourier acquisition single-shot turbo-spin-echo (HASTE) and inversion recovery (IR)-HASTE sequences
Autore:
Tang, Y; Yamashita, Y; Namimoto, T; Takahashi, M;
Indirizzi:
Kumamoto Univ, Sch Med, Dept Radiol, Kumamoto 860, Japan Kumamoto Univ Kumamoto Japan 860 h Med, Dept Radiol, Kumamoto 860, Japan
Titolo Testata:
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 2, volume: 8, anno: 1998,
pagine: 438 - 445
SICI:
1053-1807(199803/04)8:2<438:COFLLW>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEPATIC CAVERNOUS HEMANGIOMA; T2 VALUES; DIFFERENTIATION; CONTRAST; MRI; METASTASES; INTENSITY; ERRORS; IMAGES; CYSTS;
Keywords:
MRI; liver; fast imaging; inversion recovery;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Yamashita, Y Kumamoto Univ, Sch Med, Dept Radiol, 1-1-1 Honjo, Kumamoto 860, Japan Kumamoto Univ 1-1-1 Honjo Kumamoto Japan 860 moto 860, Japan
Citazione:
Y. Tang et al., "Characterization of focal liver lesions with half-Fourier acquisition single-shot turbo-spin-echo (HASTE) and inversion recovery (IR)-HASTE sequences", J MAGN R I, 8(2), 1998, pp. 438-445

Abstract

The half-Fourier acquisition single-shot turbo-spin-echo (HASTE) sequence allows for heavily Ta-weighted images, and the inversion recovery IR)-HASTEsequence represents the T1 value of the tissue in a very short time, This study was undertaken to determine whether characterizing focal liver lesions can be made by combination with these very fast sequences. Seventy-four patients (33 cysts, 28 hemangiomas, and 33 malignant solid liver masses [15 metastatic tumors, 14 hepatocellular carcinomas, and 4 cholangiocarcinomas]) underwent dynamic CT and breath-hold abdominal MRI using turbo-spin-echo (TSE), HASTE, and IR-HASTE sequences with variable TI values on a 1.5-T MR unit. The imaging time for each slice was 2 seconds for HASTE imaging and 2to 4 seconds for IR-HASTE imaging. Lesion detection and qualitative characterization were evaluated. Quantitative analysis was performed by measuringthe contrast-to-noise ratios (CNRs) as well as visual analysis, The inversion time (TI) nulling values were also statistically analyzed, All cystic lesions were detected on both TSE and HASTE imagings. For solid lesions, TSEfailed to detect one small solid lesion and HASTE sequence failed to detect three lesions. With HASTE sequences. all cysts and hemangiomas were markedly hyperintense in comparison with malignant solid masses. CNRs of hemangiomas or cysts were significantly higher than those of malignant solid masses (P <.01), and there was no overlap. The TI nulling value was 1,100 +/- 100 msec for hemangiomas, 1,900 +/- 110 msec for cysts, and 740 +/- 140 msec for malignant solid masses. There was no overlap between the TI nulling values of hemangiomas and cysts (P (,01). By combining the CNR from the HASTE sequence and the TI nulling value from the IR-HASTE sequence, complete discrimination among malignant solid masses, hemangiomas, and cysts of the liver could be made, Application of HASTE (representing T2 values) and IR-HASTE(representing T1 values) sequences provided a rapid and reliable imaging method for characterizing focal liver lesions without the use of contrast medium.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 09:39:14