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"Signal intensity"

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"Signal intensity"

Original Articles
[English]
MRI Findings of Lipiodol Uptake in Hepatocellular Carcinomas: A Focus on Signal Intensity
Myung Jae Lee, Min Jeong Kim, Seung Yon Baek
Ewha Med J 2016;39(4):110-117.   Published online October 27, 2016
DOI: https://doi.org/10.12771/emj.2016.39.4.110
Objectives

To evaluate MRI findings of non-recurrent hepatocellular carcinomas with lipiodol uptake (LHCCs) treated with transarterial chemoembolization.

Methods

28 LHCCs were divided into two groups according to amount of lipiodol uptake and tumor size, retrospectively. According to amount of lipiodol uptake, HCCs were classified into group A with dense lipiodol uptake (more than 90%) and group B with partial lipiodol uptake (between 50% and 90%). For HCC size analysis, group I was defined by a longest diameter of less than 2 cm, and group II was defined by a longest diameter of greater than or equal to 2 cm.

Results

In group A (n=16), eight LHCCs showed high signal intensity (SI) on T2-weighted images (T2WI), ten LHCCs showed low SI on T1-weighted imaged (T1WI), six LHCCs showed decreased SI at higher b value of diffusion-weighted images (DWI). In group B (n=12), six LHCCs revealed high SI on T2WI, six LHCCs revealed low SI on T1WI, ten LHCCs decreased SI at higher b value of DWI. As compared with tumor size and SI, six of 12 LHCCs in group I and eight of 16 LHCCs in group II showed high SI on T2WI. Six LHCCs in group I and ten LHCCs in group II showed low SI on T1WI. All LHCCs were not enhanced.

Conclusion

Signal intensities of LHCCs were variable, but more than half of LHCCs showed high SI on T2WI, low SI on T1WI, decreased SI at higher b value of DWI, regardless of lipiodol uptake or tumor size.

Citations

Citations to this article as recorded by  
  • Comparison of contrast-enhanced ultrasonography and MRI results obtained by expert and novice radiologists indicating short-term response after transarterial chemoembolisation for hepatocellular carcinoma
    C.-C. Lee, J.-I. Hwang, K.-H. Chang, Y.C. Lin, C.C. Chao, T.-F. Cheng, Y.-C. Chen, K.-C. Hsueh
    Clinical Radiology.2024; 79(1): e73.     CrossRef
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[English]
Clinical Correlation and MRT Findings in the Cervical Degenerative Diseases
Hyang Kwon Park
Ihwa Ŭidae chi 1997;20(2):189-197.   Published online July 24, 2015
DOI: https://doi.org/10.12771/emj.1997.20.2.189
Objectives

The multifactorial character of cervical spondylotic myelopathy indicates a probable onset and progression of this disease as well as a diversity of clinical manifestations.

Patients admitted with the clinical symptomatology of a progressive myelopathy associated with radiologic findings compatible with spondylotic degeneration of the cervical spine and who manifest appropriate neurophysiological abnormalities should be considered as candidates for surgical treatment. For several decades, both anterior and posterior spinal decompressive procedures have been performed who are generally being informed before the operation that the aim of surgery is to stabilize their neurologic condition and that actual improvement often cannot be expected.

Methods

A retrospective analysis of 42 patients admitted to the Dongdaemoon hospital utilizing MRI, CT in small amount to make diagnosis and surgical indication of degenerative cervical spine lesions was undertaken. Almost all patents were taken T1 Weighted Image(T1W1),T2 Weighted Image(T2W1) and gradient echo image on 1.5 Tesla unit. All patients could be evaluated the extent and degrees of disc hemiation, osteophytes and cord compression.

Results

A focal area of High-Signal-Intensity(HSI) was observed on T2W1 in 15 patients with myelopathy predominantly. HSI was diminished postoperatively in the patients who improved clinically , remained and unchanged who didn't improve.

Conclusion

In this study, MRI with high resolution images I the initial procedure of choice of degenerative cervical spine lesion was important on the decision making of the patients, Furthermore hight signal of the spinal cord by the compressive lesions appear to be an important indicator for predicting prognosis of patients with myelopathy.

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