Added Value of Diffusion-Weighted Acquisitions in MRI of the Abdomen and Pelvis

Moore, William; Khatri, Gaurav; Madhuranthakam, Ananth J.; Sims, Robert; Pedrosa, Iván

doi:10.2214/ajr.12.9563

Cited by 45 publications

(34 citation statements)

References 39 publications

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“…The diagnostic rate of tumors with MDCT is higher with a sensitivity of 69 to 84% and specificity of 59 to 83% [15,16].…”

Section: Resultsmentioning

confidence: 97%

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The utility of diffusion-weighted magnetic resonance imaging in differentiation of benign and malignant diffuse colon wall thickening

Koç¹,

Serhatlioğlu²

2017

Med-Science

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To examine the effectiveness of apparent diffusion coefficient (ADC) values in differentiation of benign bowel wall thickening and malignant diffuse scirrhous type's bowel wall thickening. Subject and Methods A total of 81 patients who underwent abdomen diffusion-weighted magnetic resonance imaging (DW MRI) in our clinic between April 2015 and September 2016 was analyzed. Of these patients, 42 had benign bowel wall thickening and 39 had malignant bowel wall thickening. The values of ADC were measured with two different b-values (400, 1000 s/mm2). Benign and malignant ADC values were compared using areas under the receiver-operating characteristic (ROC) curve. Results: According to the ADC values, the mean ADC values (x10-3 mm2/s) of benign lesions were 1.42±0.17 for b 400, 1.39±0.12 for b 1000. The mean ADC values (x10-3 mm2/s) of malignant lesions were 1.08±0.15 for b 400, 1.02±0.13 for b 1000. There were significantly lower ADC values in malignant lesions in all b values (P=.001 for b 400, P=.001 for b 1000). ROC analysis showed that a cut-off value of 1.24 x 10-3 mm2/s between the malignant and benign values with a sensitivity of 91 %, specificity of 85 %, and an accuracy of 84 %. The positive predictive value, negative predictive value, and diagnostic accuracy of ADC values were determined to be 97 %, 86 %, and 88 % respectively. Conclusion: Measurement of ADC values by DWI was effective in differentiation of malignant diffuse scirrhous types of bowel wall thickening from benign bowel wall thickening.

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“…The diagnostic rate of tumors with MDCT is higher with a sensitivity of 69 to 84% and specificity of 59 to 83% [15,16].…”

Section: Resultsmentioning

confidence: 97%

“…On the other hand, although conventional MRI sequences may be helpful to detect a pathological lesion, they cannot adequately differentiate between malignant and benign lesions [16,17].…”

Section: Resultsmentioning

confidence: 99%

The utility of diffusion-weighted magnetic resonance imaging in differentiation of benign and malignant diffuse colon wall thickening

Koç¹,

Serhatlioğlu²

2017

Med-Science

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“…As a result, when compared to benign tumors, in malignant tumors DW-MRI also provides a bright signal reflecting the restricted diffusion, and low ADC values in ADC mapping. However, signal intensities of the blood clot cause various signal intensities on the DW-MRI, with T2 brightness or T2 dimming effects, depending on the age of bleeding (22). Most studies on hematoma ADC measurements have shown results with a predisposition for low values (23,24).…”

Section: Dw-mri Was First Used In Cranial Imaging In the Diagnosismentioning

confidence: 99%

The role of dynamic and diffusion weighted magnetic resonance imaging in differentiating malignant and benign portal vein thrombosis

Koç¹

2018

J Turgut Ozal Med Cent

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Aim: The aim of this study was to evaluate the role of dynamic and diffusion-weighted (DW) magnetic resonance imaging (MRI) in the differentiation of benign from malignant thrombus in patients diagnosed with portal vein thrombosis. Material and Methods: A total of 56 patients were analyzed, 27 with benign and 29 with malignant thrombus on abdomen dynamic and DW MRI. The b-value of DW MRI was 400 and 1,000 mm2/sec. ADC of portal vein thrombosis was measured. Characteristics of the DW MRI signal were recorded. Contrast imaging of the thrombus was performed. The diameter of the portal vein was measured.

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“…Si bien estos hallazgos son habituales de observar, aún no se establece una adecuada especificidad diagnóstica con este método de estudio, requiriéndose mayor investigación en esta área. Sin embargo, estas secuencias pueden servir de ayuda, cuando el uso de gadolinio está contraindicado o cuando las otras adquisiciones del estudio son subóptimas 21,22 logía tuberculosa de estas alteraciones se describen algunos signos relativamente específicos para su diagnóstico. En el caso de la espondilodiscitis estos signos corresponden a una relativa preservación de la amplitud del espacio discal, con una afectación multisegmentaria (generalmente del segmento torá-cico), y un compromiso vertebral predominantemente anterior (por diseminación contigua subligamentaria entre cuerpos vecinos.…”

Section: Hallazgos De Imagenunclassified

Absceso del iliopsoas: Claves para el diagnóstico imagenológico

2017

Rev. chil. radiol.

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IntroducciónEl absceso del iliopsoas, aunque infrecuente, es una entidad potencialmente letal, insidiosa y de difícil diagnóstico, estando su caracterización dada principalmente por reportes y series de casos 1,2 . El cuadro clínico es inespecífico, por lo que la sospecha inicial es a menudo escasa. La triada clásica de presentación (fiebre, dolor lumbar y cojera) se observa tan solo en un 30% de los casos, dificultándose aún más en la actualidad su diagnóstico, por el enmascaramiento de la sintomatología generado por el indiscriminado uso de antibióticos 3,4,5,6 . Ante tal escenario, los estudios de imagen se han convertido en un pilar diagnóstico fundamental, tanto por la precocidad de su detección como por la especificidad alcanzada por algunas técnicas. El objetivo de este artículo es describir las principales características imagenológicas del absceso del iliopsoas tanto en tomografía computada (TC) como en resonancia magnética (RM), haciendo especial énfasis en sus causas, rutas de diseminación y diagnósticos diferenciales. Anatomía: Compartimento del iliopsoas y vías de diseminación retroperitoneal.Si bien los abscesos pueden presentar fistulización a estructuras y órganos adyacentes (Figura 1), tanto las colecciones como las alteraciones inflamatorias

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Added Value of Diffusion-Weighted Acquisitions in MRI of the Abdomen and Pelvis

Cited by 45 publications

References 39 publications

The utility of diffusion-weighted magnetic resonance imaging in differentiation of benign and malignant diffuse colon wall thickening

The utility of diffusion-weighted magnetic resonance imaging in differentiation of benign and malignant diffuse colon wall thickening

The role of dynamic and diffusion weighted magnetic resonance imaging in differentiating malignant and benign portal vein thrombosis

Absceso del iliopsoas: Claves para el diagnóstico imagenológico

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