A prospective assessment of breath-hold fast spin echo and inversion recovery fast spin echo techniques for detection and characterization of focal hepatic lesions

Pawluk, Randolph S; Borrello, Joseph A.; Brown, Jeffrey J.; McFarland, Elizabeth G.; Mirowitz, Scott A.; Tsao, Leland Y.

doi:10.1016/s0730-725x(00)00150-8

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…This sequence combines the properties of both T1-and T2-weighted MRI, leading to a complex contrast mixture exclusively provided by new MR systems (17). As TrueFISP displays blood homogeneously bright and permits easy delineation of organs, it has been successfully employed for imaging of the heart (18).…”

Section: Discussionmentioning

confidence: 99%

MRI of the liver: Can true FISP replace HASTE?

Herborn

Vogt

Lauenstein

et al. 2003

Magnetic Resonance Imaging

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Purpose: To determine the diagnostic accuracy of two fast breath-hold magnetic resonance (MR) imaging sequences, half-Fourier acquired single turbo spin-echo (HASTE) and true fast imaging with steady state precession (TrueFISP), for the detection and characterization of focal liver lesions Materials and Methods: A total of 186 patients with suspected focal liver lesions were enrolled in this study. All patients underwent the same standardized study protocol including HASTE and TrueFISP. A consensus reading based on all available image data served as a standard of reference for classifying lesions into cysts, hemangiomas, focal nodular hyperplasia, or malignant/other lesions. All malignant lesions, as well as hepatic adenomas and abscesses, were histologically verified. Each separated by an eight-week interval, HASTE and TrueFISP images were retrospectively reviewed in random order for the detection and characterization of focal hepatic lesions. Finally, a receiver operating characteristic (ROC) analysis was calculated.Results: HASTE images had an overall sensitivity of 0.86 and a specificity of 0.91, whereas TrueFISP showed an overall sensitivity and specificity of 0.79 and 0.83, respectively (pϾ0.1). Conclusion:Neither HASTE nor TrueFISP alone are sufficient for the detection and characterization of hepatic lesions.

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Section: Discussionmentioning

confidence: 99%

MRI of the liver: Can true FISP replace HASTE?

Herborn

Vogt

Lauenstein

et al. 2003

Magnetic Resonance Imaging

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“…Também em 1997, Tang et al compararam seqüências TSE em apnéia e com SR, ambas com bobina de sinergia, em 58 pacientes com lesões hepáticas focais, e observaram que a sensibilidade, especificidade e acurácia na detecção das lesões foram maiores na seqüência realizada com SR (19) . Resultados semelhantes foram obtidos em outras séries (35)(36)(37)(38)(39) (Figura 1).…”

Section: Sincronizador Respiratório E Apnéiaunclassified

“…Com a introdução da técnica em apnéia na avaliação do fígado, muitos trabalhos compararam-na com a sincronização respiratória para controle dos artefatos de respiração. Para Tang et al, Low et al e outros autores, a utilização de sincronizadores respiratórios aumenta a sensibilidade das seqüências na detecção de lesões hepáticas focais (19,(34)(35)(36)(37)(38)(39) , porém uma desvantagem é o aumento no tempo de aquisição das imagens. Para Kim et al e Earls et al as seqüências realizadas em apnéia são as mais sensíveis (43,44) .…”

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O valor da ressonância magnética na detecção de nódulos hepáticos utilizando-se diversas técnicas ponderadas em T2: existe consenso?

et al. 2002

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Desde o início da década de 80 a ressonância magnética vem sendo utilizada para o estudo do abdome e principalmente na detecção de nódulos hepáticos. As imagens ponderadas em T2 são as que trouxeram maior benefício quando comparadas à tomografia computadorizada com contraste. Inúmeras técnicas e seqüências de ressonância magnética ponderadas em T2 surgiram desde então, na tentativa de aumentar a eficácia diagnóstica, com menores tempos de exame. Neste sentido, foram publicados inúmeros trabalhos demonstrando a utilidade de seqüências rápidas e ultra-rápidas, com e sem supressão de gordura, em apnéia, com sincronizador respiratório e com bobinas de sinergia, entre outros avanços tecnológicos. No entanto, não há um consenso sobre qual a técnica mais apropriada e sensível para a detecção de lesões hepáticas focais. Neste artigo fazemos uma revisão bibliográfica e análise crítica das diversas técnicas de imagens ponderadas em T2, no que diz respeito às suas sensibilidades na detecção de nódulos hepáticos.

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Focal liver lesions: Breathhold gradient‐ and spin‐echo T2‐weighted imaging for detection and characterization

Yoshikawa

Mitchell

Hirota

et al. 2006

Magnetic Resonance Imaging

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Purpose:To evaluate breathhold gradient-and spin-echo (GRASE) T2-weighted imaging for the detection and characterization of focal liver lesions. Materials and Methods:Two GRASE sequences with different echo times (75 and 90 msec, GRASE 75 and GRASE 90 ) were compared with respiratory-triggered fast spin-echo (SE) and breathhold fast SE in 64 patients with 103 malignant and 51 benign lesions. Compared with respiratorytriggered and breathhold fast SE, GRASE reduced scan time by 77% to 82% and 21% to 27%, respectively. Two independent readers evaluated image quality and reviewed 504 liver segments on a segment-by-segment basis. Observer performance was evaluated with receiver operating characteristic (ROC) curve analysis. The signal-to-noise ratio (SNR) of liver and spleen, and lesion-to-liver contrastto-noise ratio (CNR) were also measured. Results:The overall quality of the GRASE images was higher than that of the respiratory-triggered and breathhold fast SE images, although signal inhomogeneities were more frequently observed with GRASE. No significant difference in the values of the area under the ROC curve (Az) for malignant lesion detection was found. The mean SNR and CNR were highest for respiratory-triggered fast SE.Conclusion: T2-weighted breathhold GRASE has the potential to provide faster liver imaging.

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A prospective assessment of breath-hold fast spin echo and inversion recovery fast spin echo techniques for detection and characterization of focal hepatic lesions

Cited by 9 publications

References 29 publications

MRI of the liver: Can true FISP replace HASTE?

MRI of the liver: Can true FISP replace HASTE?

O valor da ressonância magnética na detecção de nódulos hepáticos utilizando-se diversas técnicas ponderadas em T2: existe consenso?

Focal liver lesions: Breathhold gradient‐ and spin‐echo T2‐weighted imaging for detection and characterization

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