A Study on the Fiber Tracking Using a Vector Correlation Function in DT-MRI / 의학물리

Diffusion tensor tractorgraphy which is based on line propagation method with brute force approach is implemented and the vector correlation function is proposed in addition to the conventional fractional anisotrophy value as a criterion to select seed points. For the whole tractography, the proposed method used 41% less seed points than the conventional brute force approach for FA > or =0.3 and most of the fiber tracks in the outer region of white matter were removed. For the corticospinal tract passing through region of interest, the proposed method has produced similar results with 50% less seed points than conventional one.

Anesthetic Management for an Emergency Cesarean Section in a Patient Diagnosed with Acute Fatty Liver of Pregnancy after Delivery / 대한마취과학회지

Acute fatty liver of pregnancy (AFLP) is a late gestational complication with clinical similarities to fulminant hepatic failure. The following case illustrates our experience with anesthesia for a cesarean section in a patient with AFLP, diagnosed after delivery. A 34-year-old woman, at 34 weeks gestation, presented in acute labor and uncontrolled gestational diabetes mellitus. She complained of a mild fever, jaundice, nausea and vomiting. Laboratory tests demonstrated an increased level of activated partial thromboplastin time, aspartate aminotransferase, and alanin aminotransferase. A cesarean section was performed under general anesthesia with O2-N2O-fentanyl-midazolam-vecuronium. After delivery, she was diagnosed as AFLP. The diagnosis was made by clinical, laboratory and an ultrasound of liver findings. After conservative treatment, she recovered and was discharged on postoperative day 16.

A radiographic study of the position and shape of mental foramen in panoramic radiographs / 대한구강악안면방사선학회지

The purpose of this study was to evaluate the position and shape of mental foramen in panoramic radiographs. For t his study, panoramic radiographs were obtained from the 200 adults and evaluated the position and shape of mental foramen. According to various positional changes in panoramic radiographs of the patients, the author also obtained panoramic radiographs from the 100 adults and then evaluated the positional and shape changes of mental foramen. The following results were obtained: 1. Shapes of mental foramen were observed elliptical(43.3%), round or oval(42.5%), unidentified(7.5%) and diffuse(6.7%) type in descending order of frequency. 2. Horizontal position of mental foramen were most frequently observed at the 2nd premolar area(54.2%), and area between the 1st premolar and 2nd premolar(43.1%), area between the 2nd premolar and 1st molar(2.7%), and at apex(9.7%), overlap with apex(1.9%), superior of apex(0.2%) in descending order of frequency. 4. According to various positional changes in panoramic radiographs of the patients, shape changes of mental foramen we re more obviously observed at the forward 10mm and chin down 10degrees positioned panoramic radiographs, And changes of horizo ntal and vertical position were observed in similar to compared with normal positioned panoramic radiographs.

Adenoid cystic carcinoma of the minor salivary glands / 대한구강악안면방사선학회지

Adenoid cystic carcinoma is a malignant salivary gland tumor with typical histologic patterns. The majority of the se tumors occurs in the minor salivary glands, especially mucosa of the hard palate. The authors experienced the patient s, who compained the tumor-like soft tissue masses on the palatal and mouth floor area. After careful analysis of clinic al, radiological and histopathological findings, we diagnosed them as adenoid cystic carcinomas in the minor salivary gl ands, obtainted results were as follows: 1. Main clinical symptoms were a slow growing soft tissue mass with normal intact mucosa on the palatal area, and soft tissue mass with mild pain on the mouth floor area. 2. In the radiographic examminations, soft tissue masses were observed with invasion to adjacent structures, and modera te defined, heterogeneous soft tissue mass with enhanced margin, respectively. 3. In the histopathologic examminations, dark-stained, small unifrom basaloid cells in the hyaline or fibrous stroma we re observed as solid and cribriform patterns, respectively.

A radiographic study of the position and shape of mental foramen in panoramic radiographs / 대한구강악안면방사선학회지

The purpose of this study was to evaluate the position and shape of mental foramen in panoramic radiographs. For t his study, panoramic radiographs were obtained from the 200 adults and evaluated the position and shape of mental foramen. According to various positional changes in panoramic radiographs of the patients, the author also obtained panoramic radiographs from the 100 adults and then evaluated the positional and shape changes of mental foramen. The following results were obtained: 1. Shapes of mental foramen were observed elliptical(43.3%), round or oval(42.5%), unidentified(7.5%) and diffuse(6.7%) type in descending order of frequency. 2. Horizontal position of mental foramen were most frequently observed at the 2nd premolar area(54.2%), and area between the 1st premolar and 2nd premolar(43.1%), area between the 2nd premolar and 1st molar(2.7%), and at apex(9.7%), overlap with apex(1.9%), superior of apex(0.2%) in descending order of frequency. 4. According to various positional changes in panoramic radiographs of the patients, shape changes of mental foramen we re more obviously observed at the forward 10mm and chin down 10degrees positioned panoramic radiographs, And changes of horizo ntal and vertical position were observed in similar to compared with normal positioned panoramic radiographs.

Adenoid cystic carcinoma of the minor salivary glands / 대한구강악안면방사선학회지

Adenoid cystic carcinoma is a malignant salivary gland tumor with typical histologic patterns. The majority of the se tumors occurs in the minor salivary glands, especially mucosa of the hard palate. The authors experienced the patient s, who compained the tumor-like soft tissue masses on the palatal and mouth floor area. After careful analysis of clinic al, radiological and histopathological findings, we diagnosed them as adenoid cystic carcinomas in the minor salivary gl ands, obtainted results were as follows: 1. Main clinical symptoms were a slow growing soft tissue mass with normal intact mucosa on the palatal area, and soft tissue mass with mild pain on the mouth floor area. 2. In the radiographic examminations, soft tissue masses were observed with invasion to adjacent structures, and modera te defined, heterogeneous soft tissue mass with enhanced margin, respectively. 3. In the histopathologic examminations, dark-stained, small unifrom basaloid cells in the hyaline or fibrous stroma we re observed as solid and cribriform patterns, respectively.