Full Text Journal Articles by
Author Moon Hyung Choi

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Diagnostic performance of contrast-enhanced ultrasound for acute pyelonephritis in children.

Hyun Joo Jung, Moon Hyung Choi, Ki Soo Pai, Hyun Gi Kim,

The objective of our study was to evaluate the performance of renal contrast-enhanced ultrasound (CEUS) against the 99m-labeled dimercaptosuccinic acid (DMSA) scan and computed tomography (CT) in children for the diagnosis of acute pyelonephritis. We included children who underwent both renal CEUS and the DMSA scan or CT. A total ... Read more >>

Sci Rep (Scientific reports)
[2020, 10(1):10715]

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A LESSON FROM AUTOMATIC TUBE VOLTAGE SELECTION: FEASIBILITY OF 100 kVp IN PORTAL VENOUS PHASE ABDOMINAL CT.

Moon Hyung Choi, Young Joon Lee, Seung Eun Jung,

PURPOSE:To evaluate the relationship between ATVS-recommended tube voltage and patient body habitus and to compare radiation dose and diagnostic performance between fixed 120-kVp and ATVS protocols in portal venous phase abdomen CT. METHODS:A total of 907 portal venous phase abdominal CTs were evaluated. Radiation dose in the ATVS protocol was ... Read more >>

Radiat Prot Dosimetry (Radiation protection dosimetry)
[2020, 188(4):424-431]

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Convolutional-neural-network-based diagnosis of appendicitis via CT scans in patients with acute abdominal pain presenting in the emergency department.

Jin Joo Park, Kyung Ah Kim, Yoonho Nam, Moon Hyung Choi, Sun Young Choi, Jeongbae Rhie,

Acute appendicitis is one of the most common causes of abdominal emergencies. We investigated the feasibility of a neural-network-based diagnosis algorithm of appendicitis by using computed tomography (CT) for patients with acute abdominal pain visiting the emergency room (ER). A neural-network-based diagnostic algorithm of appendicitis was developed and validated using ... Read more >>

Sci Rep (Scientific reports)
[2020, 10(1):9556]

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Prognostic role of sarcopenia and body composition with long-term outcomes in obstructive colorectal cancer

Chul Seung Lee, Daeyoun David Won, Soon Nam Oh, Yoon Suk Lee, In Kyu Lee, In-Ho Kim, Moon Hyung Choi, Seong Taek Oh,

Abstract Background The clinical significance of sarcopenia in colorectal cancer obstruction has not yet been described. The present study aimed to determine the short and long-term oncologic impacts of sarcopenia in obstructive colorectal cancer. MethodsA total of 214 patients with obstructive colon cancer were included in this study, between January ... Read more >>

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Guidelines for Transrectal Ultrasonography-Guided Prostate Biopsy: Korean Society of Urogenital Radiology Consensus Statement for Patient Preparation, Standard Technique, and Biopsy-Related Pain Management.

Myoung Seok Lee, Min Hoan Moon, Chan Kyo Kim, Sung Yoon Park, Moon Hyung Choi, Sung Il Jung, ,

The Korean Society of Urogenital Radiology (KSUR) aimed to present a consensus statement for patient preparation, standard technique, and pain management in relation to transrectal ultrasound-guided prostate biopsy (TRUS-Bx) to reduce the variability in TRUS-Bx methodologies and suggest a nationwide guideline. The KSUR guideline development subcommittee constructed questionnaires assessing prebiopsy ... Read more >>

Korean J Radiol (Korean journal of radiology)
[2020, 21(4):422-430]

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Comparison of diagnostic performance of non-contrast MRI and abbreviated MRI using gadoxetic acid in initially diagnosed hepatocellular carcinoma patients: a simulation study of surveillance for hepatocellular carcinomas.

Sunyoung Whang, Moon Hyung Choi, Joon-Il Choi, Seo Yeon Youn, Dong Hwan Kim, Sung Eun Rha,

OBJECTIVE:This study was conducted in order to compare the diagnostic performance of noncontrast and abbreviated MRI using gadoxetic acid for detecting hepatocellular carcinoma (HCC) in initially diagnosed HCC patients. METHODS:We identified 140 consecutive patients with newly diagnosed HCC (173 HCCs) within the Milan criteria, who underwent liver MRI using gadoxetic ... Read more >>

Eur Radiol (European radiology)
[2020, 30(8):4150-4163]

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Clinical significance of skeletal muscle density and sarcopenia in patients with pancreatic cancer undergoing first-line chemotherapy: a retrospective observational study.

In-Ho Kim, Moon Hyung Choi, In Seok Lee, Tae Ho Hong, Myung Ah Lee,

Abstract Background To investigate the clinical impact of sarcopenia and skeletal muscle density among patients with metastatic pancreatic adenocarcinoma who underwent palliative first line gemcitabine-based chemotherapy. Methods A total of 330 patients with metastatic pancreatic adenocarcinoma who were treated with palliative first line gemcitabine-based chemotherapy between January 2010 and March ... Read more >>

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Tracking Changes in Clinical Practice Patterns Following Prebiopsy Biparametric Prostate MRI.

Moon Hyung Choi, Young Joon Lee, Seung Eun Jung,

RATIONALE AND OBJECTIVES:To evaluate the change in clinical practice after implementation of prebiopsy biparametric MRI followed by targeted biopsy and the benefits of prebiopsy MRI based on real clinical practice. MATERIALS AND METHODS:A total of 1,661 patients who underwent either transrectal biopsy or prebiopsy MRI for suspected prostate cancer between ... Read more >>

Acad Radiol (Academic radiology)
[2019, :]

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Multifrequency Bioelectrical Impedance Analysis Compared With Computed Tomography for Assessment of Skeletal Muscle Mass in Primary Colorectal Malignancy: A Predictor of Short-Term Outcome After Surgery.

Eun Young Kim, Seong Ryong Kim, Daeyoun David Won, Moon Hyung Choi, In Kyu Lee,

BACKGROUND:Herein, we evaluate the accuracy and reliability of multifrequency bioelectrical impedance analysis (BIA) to assess skeletal muscle mass (SMM) in the colorectal cancer patient compared with computed tomography (CT) scan and also analyze the association between SMM of BIA and postoperative outcomes. METHODS:From March to May 2017, the body composition ... Read more >>

Nutr Clin Pract (Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition)
[2019, :]

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Impact of preoperative body compositions on survival following resection of biliary tract cancer.

Seung Bae Yoon, Moon Hyung Choi, Meiying Song, Ju Hyun Lee, In Seok Lee, Myung Ah Lee, Tae Ho Hong, Eun Sun Jung, Myung-Gyu Choi,

BACKGROUND:Although surgical resection is the only potentially curative treatment for biliary tract cancer, the prognosis remains poor after a major operation such as pancreatoduodenectomy or hepatectomy. We aimed to investigate the impact of preoperative body compositions on long-term survival of patients undergoing resection of biliary tract cancer. METHODS:We analysed data ... Read more >>

J Cachexia Sarcopenia Muscle (Journal of cachexia, sarcopenia and muscle)
[2019, 10(4):794-802]

Cited: 1 time

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Reply to "Methodologic Issues in Prediction of Posthepatectomy Liver Failure".

Dong Kyun Kim, Joon-Il Choi, Moon Hyung Choi,

AJR Am J Roentgenol (AJR. American journal of roentgenology)
[2019, 212(4):W110]

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Prebiopsy Biparametric MRI for Clinically Significant Prostate Cancer Detection With PI-RADS Version 2: A Multicenter Study.

Moon Hyung Choi, Chan Kyo Kim, Young Joon Lee, Seung Eun Jung,

OBJECTIVE:The purpose of this study was to evaluate the diagnostic performance of the Prostate Imaging Reporting and Data System version 2 (PI-RADSv2) with respect to prebiopsy MRI with and without dynamic contrast enhancement in the detection of clinically significant cancer (CSC). MATERIALS AND METHODS:A total of 113 patients with prostate ... Read more >>

AJR Am J Roentgenol (AJR. American journal of roentgenology)
[2019, 212(4):839-846]

Cited: 1 time

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MRI of pancreatic ductal adenocarcinoma: texture analysis of T2-weighted images for predicting long-term outcome.

Moon Hyung Choi, Young Joon Lee, Seung Bae Yoon, Joon-Il Choi, Seung Eun Jung, Sung Eun Rha,

PURPOSE:To assess the association between T2-weighted imaging (T2WI) texture-analysis parameters and the pathological aggressiveness or long-term outcomes in pancreatic ductal adenocarcinoma (PDAC) patients. METHODS:A total of 66 patients (mean age 65.3 ± 9.0 years) who underwent preoperative MRI followed by pancreatectomy for PDAC between 2013 and 2015 were included in this study. A ... Read more >>

Abdom Radiol (NY) (Abdominal radiology (New York))
[2019, 44(1):122-130]

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CT-quantified muscle and fat change in patients after surgery or endoscopic resection for early gastric cancer and its impact on long-term outcomes.

Moon Hyung Choi, Kyung Ah Kim, Seong Su Hwang, Jae Young Byun,

The purpose of this study was to evaluate the impact of the body composition changes on patients' long-term outcomes after endoscopic resection or surgery for mucosal gastric cancer.This case-control study included 96 patients who underwent endoscopic resection or surgery after propensity score matching. Areas of fat and muscle measured on ... Read more >>

Medicine (Baltimore) (Medicine)
[2018, 97(52):e13878]

Cited: 2 times

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The Role of Transrectal Ultrasound for Finding Focal Lesions in Prostate Cancer Detection Compared to Systematic Sextant Biopsy.

Moon Hyung Choi, Young Joon Lee, Seung Eun Jung,

OBJECTIVES:To evaluate the difference in cancer detection rate between targeted biopsy of focal lesions detected on transrectal ultrasound (TRUS) and systematic sextant biopsy. MATERIALS AND METHODS:This retrospective study included patients who underwent TRUS-guided prostate biopsy between April 2014 and April 2017 and classified them into three groups: (1) sextant biopsy ... Read more >>

Acad Radiol (Academic radiology)
[2019, 26(8):1023-1029]

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Evaluation of the prognostic value of the new AJCC 8th edition staging system for patients with pancreatic adenocarcinoma; a need to subclassify stage III?

Meiying Song, Seung Bae Yoon, In Seok Lee, Tae Ho Hong, Ho Joong Choi, Moon Hyung Choi, Myung Ah Lee, Eun Sun Jung, Myung-Gyu Choi,

BACKGROUND:There have been several proposed changes for the 8th edition of the American Joint Commission on Cancer (AJCC) for pancreatic adenocarcinoma. The aim of this study was to evaluate the prognostic value of the new staging system for patients with pancreatic adenocarcinoma, especially in stage III patients. METHODS:We analysed the ... Read more >>

Eur. J. Cancer (European journal of cancer (Oxford, England : 1990))
[2018, 104:62-69]

Cited: 1 time

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More Frequent Follow-up CT Scans in Postsurgical Resection Patients Than in Postendoscopic Resection Patients of Early Gastric Cancers: Impracticality of CTs for Mucosal Cancer.

Moon Hyung Choi, Seung Eun Jung, Young Joon Lee, Seung Bae Yoon,

RATIONALE AND OBJECTIVES:The aim of this study was to compare the utility and timing of computed tomography (CT) in the detection of recurrent tumors between patients after surgical and endoscopic resections for early gastric cancer (EGC). MATERIALS AND METHODS:A total of 670 patients after surgical (n = 535) and endoscopic (n = 135) resections ... Read more >>

Acad Radiol (Academic radiology)
[2019, 26(5):651-657]

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Histogram Analysis of Perfusion Parameters from Dynamic Contrast-Enhanced MR Imaging with Tumor Characteristics and Therapeutic Response in Locally Advanced Rectal Cancer.

Dong Myung Yeo, Soon Nam Oh, Moon Hyung Choi, Sung Hak Lee, Myung Ah Lee, Seung Eun Jung,

Purpose:To explore the role of histogram analysis of perfusion parameters from dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) based on entire tumor volume in discriminating tumor characteristics and predicting therapeutic response in rectal cancer. Materials and Methods:Thirty-seven DCE-MRIs of locally advanced rectal cancer patients who received chemoradiation therapy (CRT) before surgery ... Read more >>

Biomed Res Int (BioMed research international)
[2018, 2018:3724393]

Cited: 2 times

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Prediction of Posthepatectomy Liver Failure: MRI With Hepatocyte-Specific Contrast Agent Versus Indocyanine Green Clearance Test.

Dong Kyun Kim, Joon-Il Choi, Moon Hyung Choi, Michael Yong Park, Young Joon Lee, Sung Eun Rha, Seung Eun Jung,

OBJECTIVE:The objective of our study was to identify whether quantitative measurements from gadoxetic acid-enhanced MRI are useful for predicting posthepatectomy liver failure (PHLF) in patients with hepatocellular carcinoma (HCC) compared with and in combination with future remnant liver volume (FRLV) and an indocyanine green (ICG) clearance test. MATERIALS AND METHODS:Preoperative ... Read more >>

AJR Am J Roentgenol (AJR. American journal of roentgenology)
[2018, 211(3):580-587]

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Discordancy and changes in the pattern of programmed death ligand 1 expression before and after platinum-based chemotherapy in metastatic gastric cancer.

Ji Hyun Yang, Hyunho Kim, Sang Young Roh, Myung Ah Lee, Jae Myung Park, Han Hee Lee, Cho Hyun Park, Han Hong Lee, Eun Sun Jung, Sung Hak Lee, Young Joon Lee, Moon Hyung Choi, Okran Kim, In-Ho Kim,

BACKGROUND:Our goal was to evaluate changes in PD-L1 expression in primary tumours of metastatic gastric cancer before and after chemotherapy. METHODS:We evaluated the PD-L1 expression of 72 patients with primary gastric cancer, before and after palliative first-line platinum-based chemotherapy, between January 2015 and March 2017. The PD-L1 ratio was defined ... Read more >>

Gastric Cancer (Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association)
[2019, 22(1):147-154]

Cited: 2 times

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Splenic Infarction as a Delayed Febrile Complication Following Radical Gastrectomy for Gastric Cancer Patients: Computed Tomography-Based Analysis.

Yoon Ju Jung, Ho Seok Seo, Han Hong Lee, Ji Hyun Kim, Kyo Young Song, Moon Hyung Choi, Cho Hyun Park,

The aim of this study was to evaluate the incidence and clinical characteristics of splenic infarction (SI) in gastric cancer patients who have undergone gastrectomy.For this study, the medical records of 1084 patients were reviewed and 877 patients were ultimately enrolled. The times of symptom onset, diagnosis of SI, and ... Read more >>

World J Surg (World journal of surgery)
[2018, 42(6):1826-1832]

Cited: 2 times

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Reproducibility of mRECIST in Measurement and Response Assessment for Hepatocellular Carcinoma Treated by Transarterial Chemoembolization.

Moon Hyung Choi, Ga Eun Park, Soon Nam Oh, Michael Yong Park, Sung Eun Rha, Young Joon Lee, Seung Eun Jung, Joon-Il Choi,

RATIONALE AND OBJECTIVES:To evaluate the reproducibility of Modified Response Evaluation Criteria in Solid Tumors (mRECIST) for hepatocellular carcinoma (HCC) after transarterial chemoembolization (TACE) using multiphasic computed tomography. MATERIALS AND METHODS:The institutional review board approved this retrospective study. We evaluated 97 patients who underwent TACE (60 conventional TACE [cTACE] and 37 ... Read more >>

Acad Radiol (Academic radiology)
[2018, 25(11):1363-1373]

Cited: 2 times

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Preoperative sarcopenia and post-operative accelerated muscle loss negatively impact survival after resection of pancreatic cancer.

Moon Hyung Choi, Seung Bae Yoon, Kyungjin Lee, Meiying Song, In Seok Lee, Myung Ah Lee, Tae Ho Hong, Myung-Gyu Choi,

BACKGROUND:Sarcopenia and post-operative accelerated muscle loss leading to cachexia are commonly observed in patients with pancreatic cancer. This study aimed to assess the influence of body compositions and post-operative muscle change on survival of patients with surgically treated pancreatic cancer. METHODS:We analysed data of patients diagnosed with pancreatic adenocarcinoma who ... Read more >>

J Cachexia Sarcopenia Muscle (Journal of cachexia, sarcopenia and muscle)
[2018, 9(2):326-334]

Cited: 7 times

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Low-dose CT for the diagnosis of appendicitis in adolescents and young adults (LOCAT): a pragmatic, multicentre, randomised controlled non-inferiority trial.

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BACKGROUND:CT radiation is arguably carcinogenic. Results from single-centre studies, mostly retrospective, have advocated lowering the CT radiation dose for the diagnosis of appendicitis. However, adoption of low-dose CT has been slow. We aimed to assess the effectiveness of low-dose CT compared with standard-dose CT in the diagnosis of appendicitis in ... Read more >>

Lancet Gastroenterol Hepatol (The lancet. Gastroenterology & hepatology)
[2017, 2(11):793-804]

Cited: 5 times

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Location of Disease on Imaging may Predict Radiation Exposure During Endoscopic Retrograde Cholangiopancreatography.

Moon Hyung Choi, Seung Eun Jung, Seung Bae Yoon, In Seok Lee, Jae Young Byun,

Endoscopic retrograde cholangiopancreatography (ERCP) is performed for various diseases. The aim of this study is to evaluate the difference of dose-area product (DAP) during the ERCP procedures according to location of the lesion. We performed a retrospective study of consecutive 217 therapeutic ERCP examinations performed between November 2014 and April ... Read more >>

Radiat Prot Dosimetry (Radiation protection dosimetry)
[2017, 177(3):280-284]

Cited: 2 times

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