6 research outputs found
μ기곡λͺ λ¦Όνκ΄μ‘°μμ μ μ΄μ©ν μμ§μμμ λ¦ΌνλΆμ’ νκ°
νμλ
Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ : μνκ³Ό, 2017. 2. μ΅μΉν.λͺ©μ : μμ§ λ¦ΌνλΆμ’
μ νκ°ν¨μ μμ΄μ μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ μ μ©μ±μ λ¦Όνκ΄ μ ν°κ·ΈλνΌμ λΉκ΅νμ¬ νκ°νλ€.
λμ λ° λ°©λ²: λ³Έ μ°κ΅¬λ λ³Έμμ μνμ°κ΅¬μ€λ¦¬μ¬μμμν μΉμΈμ λ°μμΌλ©° λͺ¨λ μμμ λ° νμμμ μλ©΄ λμλ₯Ό λ°μ ν μ§ννμλ€. μ°μ 7λͺ
μ μμμμμ κ°λλΆνΈλ‘€ νΌλ΄μ£Όμ¬λ₯Ό ν λ€ 3.0T μ₯λΉμμ μ§λ°©ν¬ν 3μ°¨μ κ²½μ¬μμ½ μ기곡λͺ
κΈ°λ²μΌλ‘ μμμ νλνμ¬ μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ νλ‘ν μ½μ ν립νμλ€. κ·Έλ¦¬κ³ μΌμΈ‘μ± λ¦ΌνλΆμ’
νμ 6λͺ
μμ μ기곡λͺ
λ¦Όνκ΄μ‘°μμ κ³Ό λ¦Όνκ΄ μ ν°κ·ΈλνΌλ₯Ό μννμ¬ κ·Έ κ²°κ³Όλ₯Ό μλ‘ λΉκ΅νμλ€. λ μμ κΈ°λ²μ μ€ν κ²°κ³Όλ κ°κ° 2λͺ
μ μμμνκ³Ό μμ¬μ 1λͺ
μ ν΅μνκ³Ό μμ¬κ° λΆμνμμΌλ©°, λ¦Όν λ°°μ‘μ μμ λ° μ§μ° μ λ, λ¦Όνκ΄κ³Ό λ¦Όνμ μ μ μλ, κ·Έλ¦¬κ³ λ¦Όνκ΄μ΄ μκ°νλλ ν΄λΆνμ λμ΄μ λ€μ― κ°μ§ νλͺ©μ λν΄μ νκ°νμλ€. νμμ μμ μ견과 μμ κ²μ¬ κ²°κ³Όλ₯Ό ν λλ‘ κ° νμμμμ μ§λ¨ κΈ°μ€μ μ€μ ν νμ μ΄λ₯Ό λ°νμΌλ‘ μ기곡λͺ
λ¦Όνκ΄μ‘°μμ κ³Ό λ¦Όνκ΄ μ ν°κ·ΈλνΌμ λ―Όκ°λμ νΉμ΄λλ₯Ό κ³μ°νμλ€.
κ²°κ³Ό: μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ λͺ¨λ νμμμ μ§μ°λ λ¦Όν λ°°μ‘μ 보μ¬μ€ λ°λ©΄ λ¦Όνκ΄ μ ν°κ·ΈλνΌλ 6λͺ
μ€ 5λͺ
μ νμμμ μ§μ°λ λ¦Όν λ°°μ‘μ λνλ΄μλ€. λ¦Όν λ°°μ‘ μμμ κ΄ν΄μλ μ기곡λͺ
λ¦Όνκ΄μ‘°μμ κ³Ό λ¦Όνκ΄ μ ν°κ·ΈλνΌ κ°κ°μμ λͺ¨λ νμμμ λΆλΆμ μΌλ‘ νΌμ Έμλ λ¦Όν λ°°μ‘μ΄ λ³΄μλ€. μ‘μλΆ λ¦Όνμ μ λ μμ κΈ°λ² λͺ¨λμμ μκ°νλμ§ μμλ€. μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μμμλ λͺ¨λ νμμμ λμ΄λμλ λ¦Όνκ΄μ΄ μ€λ±λμ μ μλλ‘ λνλ¬μΌλ, λ¦Όνκ΄ μ ν°κ·ΈλνΌ μμμλ 1λͺ
μμ μ€λ±λμ μ μλλ‘, 4λͺ
μμ λΆλν μ λμ μ μλλ‘ λνλ¬μΌλ©° 1λͺ
μμλ λ¦Όνκ΄μ΄ 보μ΄μ§ μμλ€. λ¦Όνκ΄μ΄ μμνλ λμ΄λ λ κ²μ¬ λͺ¨λμμ μμ 1λͺ
, μ μ 4λͺ
, κ·Έλ¦¬κ³ μλΆ 1λͺ
μ΄μλ€. μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ 4κ°μ νλͺ© λͺ¨λμμ 100νΌμΌνΈμ λ―Όκ°λλ₯Ό λ³΄μΈ λ°λ©΄, λ¦Όνκ΄ μ ν°κ·ΈλνΌμ λ―Όκ°λλ λ¦Όνκ΄ λ¬μ¬ νλͺ©μμλ 83.3νΌμΌνΈμκ³ , λλ¨Έμ§ 3κ° νλͺ©μμλ 100νΌμΌνΈμλ€. μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ νΉμ΄λλ λ¦Όν λ°°μ‘μ μ§μ° νλͺ©μμ 85.7νΌμΌνΈμκ³ λλ¨Έμ§ νλͺ©μμλ 100νΌμΌνΈμμΌλ©°, λ¦Όνκ΄ μ ν°κ·ΈλνΌμ νΉμ΄λλ λ¦Όν λ°°μ‘μ μμ νλͺ©μμ 66.7νΌμΌνΈμκ³ λλ¨Έμ§ νλͺ©μμλ 100νΌμΌνΈμλ€. λ κ²μ¬μ κ° νλͺ© κ²°κ³Όκ°μμλ λ¦Όν λ°°μ‘μ μ§μ° μ λμ μμμ΄ 83.3νΌμΌνΈμμ μΌμΉνμκ³ λ κ²μ¬ λͺ¨λμμ λͺ¨λ νμμ μ‘μλΆ λ¦Όνμ μ΄ λ³΄μ΄μ§ μμλ€. κ΄μ°°λ λ¦Όνκ΄μ ν΄λΆνμ λμ΄λ 66.7νΌμΌνΈμ νμμμ μΌμΉνμλ€.
κ²°λ‘ : μ기곡λͺ
λ¦Όνκ΄μ‘°μμ μ λ¦Όνκ΄μ ννλ₯Ό νκ°ν¨μ μμ΄μ λ¦Όνκ΄ μ ν°κ·ΈλνΌλ³΄λ€ μ°μν κ²°κ³Όλ₯Ό 보μλ€. κ·Έλ°μ μ‘μλΆ λ¦Όνμ μ μ‘°μμ¦κ° μ¬λΆμ λ¦Όνκ΄ λ°°μ‘ νκ°μ μμ΄μλ λ μμ κΈ°λ²μ΄ λͺ¨λ νμ λλ κ±°μ λͺ¨λ νμμμ λμΌν κ²°κ³Όλ₯Ό 보μλ€.Purpose: To validate usefulness of magnetic resonance (MR) lymphangiography for evaluation of peripheral lymphedema in upper extremities by comparison with lymphoscintigraphy.
Materials and Methods: This prospective study had institutional review board approval and written informed consent was obtained from all patients. Initially, protocol of MR lymphangiography for upper extremity was established in seven healthy volunteers with 3.0T fat-saturated three-dimensional gradient-echo MR after gadobutrol injection. Then six patients with unilateral lymphedema of the upper extremities were examined with MR lymphangiography and lymphoscintigraphy, and the results were correlated with each other. Results of both techniques were separately evaluated by two radiologists and a nuclear physician in terms of delay and pattern of lymphatic drainage, conspicuity of the visualization of lymph vessels and axillary lymph nodes, and enhancing levels of lymphatic system. We calculated sensitivity and specificity of both techniques by using a combined consensus of clinical presentations and imaging findings of the patients determined by the radiologist, nuclear physician, and referring physician as the reference standard. We also evaluated correlation of both techniques.
Results: MR lymphangiography and lymphoscintigraphy showed delayed drainage and partially diffuse drainage in all patients. Axillary lymph node was not visualized on both techniques. MR lymphangiography demonstrated lymphangiectasia with moderate conspicuity in all six patients while lymphoscintigraphy showed lymph vessels with moderate conspicuity in one patient, poor conspicuity in four patients, and no visualization in the other patient. Both MR lymphangiography and lymphoscintigraphy showed lymph vessels up to upper arm in one patient, forearm in four patients, and only hand in the other patient. MR lymphangiography showed sensitivities of 100% for all four categories, while lymphoscintigraphy yielded a sensitivity of 83.3% for delineation of lymph vessels and 100% for the other three categories. Specificity of MR lymphangiography was 85.7% for delay of drainage and 100% for other three categories, while lymphoscintigraphy showed specificity of 100% for delay of lymphatic drainage, depiction of lymph vessels and enhancement of axillary lymph nodes, and 66.7% for pattern of lymphatic drainage. Delay and pattern of drainage was same in 83.3% and non-visualization of axillary LNs was indistinguishably noted in all patients on both techniques. Anatomic level of enhanced lymph vessel was identical in 66.7% of the patients.
Conclusion: MR lymphangiography showed better performance for depiction of lymph vessels. MR lymphangiography and lymphoscintigraphy yielded same results in all or most patients for evaluation of axillary lymph nodes enhancement and lymphatic drainage in upper extremity.Introduction 1
Materials and methods 3
Results 10
Discussion 16
References 21
Tables and figures 24
Abstract in Korean 35Maste
Comparison with Histopathology as the Reference Standard
νμλ
Όλ¬Έ(λ°μ¬)--μμΈλνκ΅ λνμ :μκ³Όλν μνκ³Ό,2020. 2. μ΄μ¬μ.Purpose: To evaluate the diagnostic performance of the normalized local variance (NLV) ultrasound technique in the assessment of hepatic steatosis, and to identify the factors that influence the NLV value using histopathological examination as the reference standard.
Materials and Methods: Forty male Sprague-Dawley rats were fed a methionine-choline-deficient diet for variable periods (0, 2, 4, 6, 8, 10, or 12 days or 2, 3, or 4 weeks; four rats per group). At the end of each diet duration, magnetic resonance spectroscopy (MRS) and NLV examination were performed. Thereafter, the rats were sacrificed and their livers were histopathologically evaluated. Receiver operating characteristic (ROC) curve analysis was performed to assess the diagnostic capability of the NLV value in the detection of varying degrees of hepatic steatosis. Univariate and multivariate linear regressions were used to determine the factors associated with the NLV value.
Results: The areas under the ROC curve for the detection of mild, moderate, and severe hepatic steatosis were 0.953, 0.896, and 0.735, respectively. The NLV value showed comparable diagnostic performance to that of MRS in the detection of β₯ mild or β₯ moderate hepatic steatosis. Multivariate linear regression analysis revealed that the degree of hepatic steatosis was the only significant factor affecting the NLV value (p < 0.001).
Conclusion: The NLV value demonstrated satisfactory diagnostic performance in the assessment of varying degrees of hepatic steatosis. The degree of hepatic steatosis was the only significant factor that affected the NLV value.λͺ©μ : νμ€ν κ΅μ λΆμ° (normalized local variance, NLV) μ΄μν κΈ°λ²μ μ§λ°©κ° μ§λ¨λ₯μ νκ°νκ³ , μ‘°μ§λ³λ¦¬ν κ²μ¬ κ²°κ³Όλ₯Ό μ§λ¨ κΈ°μ€μΌλ‘ νμ μ NLV κ°μ μν₯μ λ―ΈμΉλ μΈμλ₯Ό νꡬνλ€.
λμ λ° λ°©λ²: 40 λ§λ¦¬μ μμ»· Sprague-Dawley λ«μκ² λ©ν°μ€λ-μ½λ¦° κ²°ν μ¬λ£λ₯Ό λ€μν κΈ°κ° λμ κΈμ΄ νμλ€ (0, 2, 4, 6, 8, 10, 12 μΌ, λλ 2, 3, 4 μ£Ό; κ° κ΅° λΉ 4 λ§λ¦¬). κ° κΈμ΄ κΈ°κ° μ’
λ£ μμ μ기곡λͺ
λΆκ΄μμ (magnetic resonance spectroscopy, MRS)κ³Ό NLV κ²μ¬λ₯Ό μννμλ€. μ΄ν λ«νΈλ₯Ό μλ½μ¬μν¨ ν κ°μ μ μΆν΄μ μ‘°μ§λ³λ¦¬νμ μΌλ‘ κ²μ¬νμλ€. μμ μ μ‘°μ νΉμ± (Receiver operating characteristic, ROC) 곑μ λΆμμ μ΄μ©ν΄μ NLV κ°μ΄ λ€μν μ λμ μ§λ°©κ°μ κ²μΆν΄λ΄λ μ±λ₯μ νκ°νμλ€. λν λ¨λ³λ λ° λ€λ³λ μ ν νκ·λΆμμ ν΅ν΄μ NLV κ°κ³Ό μ°κ΄λ λ³μλ₯Ό νꡬνμλ€.
κ²°κ³Ό: κ²½μ¦ μ΄μ, μ€λ±μ¦ μ΄μ, μ€μ¦μ μ§λ°©κ° κ²μΆμ λν ROC 곑μ ν λ©΄μ μ κ°κ° 0.953, 0.896, 0.735 μλ€. NLV κ°μ κ²½μ¦ μ΄μ λ° μ€λ±μ¦ μ΄μμ μ§λ°©κ° κ²μΆμ λν΄μ MRSμ λλ±ν μ§λ¨λ₯μ 보μλ€. λ€λ³λ μ ν νκ·λΆμμ ν΅ν΄μ μ‘°μ§λ³λ¦¬ μ μ§λ°©κ°μ μ λκ° NLV κ°μ μν₯μ λ―ΈμΉλ μ μΌν μμΈμμ νμΈνμλ€ (P < 0.001).
κ²°λ‘ : NLV κ°μ λ€μν μ λμ μ§λ°©κ° νκ°μ λ§μ‘±μ€λ¬μ΄ μ§λ¨λ₯μ 보μλ€. μ‘°μ§λ³λ¦¬ μ μ§λ°©κ°μ μ λλ NLV κ°μ μ μΌν κ²°μ μμΈμ΄μλ€.I . Introduction 1
II. Materials and methods 4
III. Results 11
IV. Discussion 15
V. References 21
VI. Tables and figures 26
VII. Abstract in Korean 35Docto