Publications by authors named "Jae-Mun Lee"
Article Synopsis
- Retrospective study assessed imaging changes over time using MDCT and 3D CT gastrography after endoscopic submucosal dissection (ESD) in early gastric cancer patients, comparing imaging findings to endoscopic features.
- A total of 105 CT scans from 84 patients were analyzed, revealing high sensitivity in detecting lesions with no instances of tumor recurrence or metastasis during follow-ups.
- Findings showed that 3D CTG improved lesion detectability (76.7%) compared to 2D CT (42.0%), indicating its effectiveness in monitoring post-ESD changes.
Article Synopsis
- The study assessed the diagnostic effectiveness and imaging characteristics of deep infiltrating endometriosis (DIE) affecting the rectosigmoid colon using CT colonography versus MRI.
- A total of 50 patients diagnosed with DIE underwent both CT and MRI before laparoscopic surgery, where the presence of rectosigmoid involvement was confirmed in 37 of them.
- Results showed that CT colonography had higher diagnostic sensitivity and specificity compared to MRI, especially for cases with complete cul-de-sac obliteration of endometriosis, indicating it may be a better tool for diagnosis in these scenarios.
Purpose: To investigate the correlations between parameters of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and prognostic factors in rectal cancer.
Materials And Methods: We studied 29 patients with rectal cancer who underwent gadolinium contrast-enhanced, T1-weighted DCE-MRI with a three Tesla scanner prior to surgery. Signal intensity on DCE-MRI was independently measured by two observers to examine reproducibility.
Article Synopsis
- The study assessed how a microbubble contrast agent (SonoVue) impacts High-Intensity Focused Ultrasound (HIFU) ablation in rabbit livers.
- The results showed that using the contrast agent significantly increased the size of tissue necrosis and reduced the time needed for ablation compared to HIFU alone.
- Additionally, the combination approach led to more varied patterns of tissue damage, suggesting that microbubble agents could enhance the effectiveness of HIFU treatments.
Article Synopsis
- The study discusses the successful use of high-intensity focused ultrasound for treating acute vaginal bleeding caused by uterine myoma in two young women.
- Both patients experienced heavy bleeding and painful periods, which were not relieved by medications.
- After the ultrasound treatment, they both saw their symptoms significantly improve and returned to normal menstrual cycles, with no complications reported during the two months following the procedure.
Objective: The purpose of this study was to evaluate any improvement in the quality of abdominal CTs after the utilization of the nationally based accreditation program.
Materials And Methods: Approval was obtained from the Institutional Review Board, and informed consent was waived. We retrospectively analyzed 1,011 outside abdominal CTs, from 2003 to 2007.
Primary gastric carcinoma is the most common cause of linitis plastica. Less frequently, metastatic gastric cancer from the breast, omental metastases and non-Hodgkin lymphoma involving the stomach have been reported to show similar radiographic findings as for linitis plastica. A metastatic gastric cancer from bladder cancer is extremely rare.
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- The presentation focuses on understanding different cystic masses in the female groin and their ultrasound appearances.
- High-frequency sonography techniques are used to obtain clear images for better diagnosis, enhanced by color Doppler imaging.
- Various types of cystic masses identified include round ligament cysts, varicosities, inguinal herniation of the ovary, and other conditions, with sonography proving to be an effective diagnostic tool.
The pancreatic endocrine tumors are rare neuroendocrine tumors of the pancreas originating from totipotential stem cells or differentiated mature endocrine cells within the exocrine gland. Endocrine tumors are usually classified into functioning and non-functioning tumors and presents with a range of benignity or malignancy. In this article, we present the various CT and MR imaging findings of endocrine tumors of pancreas according to recent WHO classification.
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- A 37-year-old woman had a mesothelial cyst in the round ligament that felt like a lump.
- An ultrasound showed it as a spindle-shaped structure with multiple fluid-filled areas.
- The cyst was initially mistaken for an ovarian hernia before surgery.
Objective: We studied the incidence and appearance of the sternalis muscles on multidetector computed tomography (MDCT) to permit the differentiation of the sternalis from significant pathologic condition.
Methods: We retrospectively evaluated consecutive contrast-enhanced 16 row MDCT scans of the chest obtained in 1387 Korean patients (790 males and 597 females) between September 2003 and January 2005. All computed tomography scans were obtained in the supine position.
The aim of this study was to assess the correlation between 18F-fluorodeoxyglucose positron emission tomography (FDG PET) positivity of tumor recurrence and vascularity, Ki-67, p53, and histologic grade in patients with ovarian cancer. Nineteen patients with recurrent ovarian cancer underwent FDG PET before second-look surgery. Archival paraffin-embedded tissue materials were used to assess histologic grade including architectural pattern, mitotic activity, and nuclear pleomorphism; intratumor microvessel density (MVD); Ki-67; and p53.
View Article and Find Full Text PDFPurpose: The aim of this prospective study was to evaluate the diagnostic value of power Doppler ultrasonography (PDUS) and contrast-enhanced PDUS (CEPDUS) in the depiction and characterization of experimentally induced arthritis in the rabbit.
Materials And Methods: Thirty rabbits were divided into three groups consisting of one control group (saline injection group) and two experimental groups: a suppurative arthritis group and a chemically induced synovitis group. The same amount (1 ml) of each agent was directly injected into the right hip joint.
Article Synopsis
- The article explores the clinical and imaging characteristics of rare ovarian tumors called sex cord-stromal tumors, which come from stromal cells and primitive sex cords.
- Common types include granulosa cell tumors, fibrothecomas, sclerosing stromal tumors, and Sertoli-Leydig cell tumors, with these tumors being hormonally active and having unique imaging features.
- The study concludes that understanding clinical and radiologic signs aids in distinguishing these tumors from more prevalent epithelial tumors, and that they are mainly treated with surgery, generally leading to a good prognosis.
Purpose: To evaluate the MRI findings in breast cancer patients who had undergone a modified radical mastectomy (MRM) and a transverse rectus abdominis myocutaneous (TRAM) flap.
Materials And Methods: MRI was performed on 20 patients who had been diagnosed with breast cancer and had undergone an MRM and TRAM flap. The results were examined in terms of MRI's ability to detect the flap and assess possible postoperative changes and recurrence.
The purpose of this study was to assess clinical 1H MR spectroscopy (MRS) as a noninvasive method for evaluating brain tumor malignancy at 3T high-field system. Using 3T MRI/MRS system, localized water-suppressed single-voxel technique in patients with brain tumor (i.e.
View Article and Find Full Text PDFVarious pathologic conditions can occur in the renal sinus, primarily originating in the constituents of the renal sinus, and the renal sinus can be secondarily involved by surrounding renal parenchymal and adjacent retroperitoneal lesions. Lipomatosis and cysts are common renal sinus lesions with little clinical significance, but differentiation from other pathologic conditions is important. Renal vascular lesions such as renal artery aneurysm or arteriovenous fistula can mimic other parapelvic or peripelvic lesions at excretory urography, but their vascular nature is evident at color Doppler ultrasonography, contrast material-enhanced computed tomography (CT), and magnetic resonance (MR) imaging.
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- The report discusses a case of cystic hypersecretory duct carcinoma in a 49-year-old woman presenting with a palpable breast mass and no prior breast issues.
- Mammography showed dense breast tissue with no significant abnormalities, while ultrasound revealed multiple small cysts in the area of concern.
- The excision biopsy confirmed the diagnosis, indicating that distinguishing this carcinoma from benign lesions is crucial, highlighting the need for thorough microscopic evaluation.
The aim of this study was to assess imaging findings on CT or MR images of histologically proven ovarian cystadenofibromas. In the period 1995-2001, 32 histologically proven ovarian cystadenofibromas were identified in 28 women. Of the 32 ovarian cystadenofibromas, 16 tumors were purely cystic and the remaining 16 were complex cystic on CT or MR images.
View Article and Find Full Text PDFTo investigate whether there are significant changes in regional brain metabolism in patients with Parkinson's disease before and after thalamotomy using proton magnetic resonance spectroscopy (1H MRS). Fifteen patients underwent 15 stereotactic thalamotomies for control of medically refractory parkinsonian tremor. Single-voxel 1H MRS was carried out on a 1.
View Article and Find Full Text PDFInfantile scrotal pyocele simulating missed testicular torsion on sonography.
J Clin Ultrasound
February 2003
Article Synopsis
- A neonate was diagnosed with idiopathic infantile pyocele, identified through scrotal sonography showing a complex fluid collection in the left scrotal sac.
- The imaging revealed features such as septations, thickened scrotal walls, and moderate echogenicity, which suggested possible missed testicular torsion.
- However, surgery confirmed a pyocele without an identifiable source, highlighting the need for radiologists to recognize how pyocele can resemble missed testicular torsion on Doppler sonography.
Article Synopsis
- Abdominal neurogenic tumors are diverse and can be classified based on their origin into ganglion cell tumors, paraganglionic tumors, and nerve sheath tumors.
- These tumors typically appear as well-defined masses in the retroperitoneum, especially around the spine and adrenal glands, and can exhibit calcification.
- While imaging techniques like CT and MRI are essential for diagnosis and assessing tumor extent, distinguishing between benign and malignant tumors can be challenging without evidence of metastasis.