OBJECTIVE: To test the effects of heart rate, body mass index (BMI) and noise level on interscan and interobserver variability of coronary artery calcium (CAC) scoring on a prospective electrocardiogram (ECG)-triggered 64-slice CT. MATERIALS AND METHODS:One hundred and ten patients (76 patients with CAC) were scanned twice on prospective ECG-triggered scans. The scan parameters included 120 kV, 82 mAs, a 2.5 mm thickness, and an acquisition center at 45% of the RR interval. The interscan and interobserver variability on the CAC scores (Agatston, volume, and mass) was calculated. The factors affecting the variability were determined by plotting it against heart rate, BMI, and noise level (defined as the standard deviation: SD). RESULTS: The estimated effective dose was 1.5 +/- 0.2 mSv. The mean heart rate was 63 +/- 12 bpm (range, 44-101 bpm). The patient BMIs were 24.5 +/- 4.5 kg/m2 (range, 15.5-42.3 kg/m2). The mean and median interscan variabilities were 11% and 6%, respectively by volume, and 11% and 6%, respectively, by mass. Moreover, the mean and median of the algorithms were lower than the Agatston algorithm (16% and 9%, respectively). The mean and median interobserver variability was 10% and 4%, respectively (average of algorithms). The mean noise levels were 15 +/- 4 Hounsfield unit (HU) (range, 8-25 HU). The interscan and interobserver variability was not correlated with heart rate, BMI, or noise level. CONCLUSION: The interscan and interobserver variability of CAC on a prospective ECG-triggered 64-slice CT with high image quality and 45% of RR acquisition is not significantly affected by heart rate, BMI, or noise level. The volume or mass algorithms show reduced interscan variability compared to the Agatston scoring (p < 0.05).
Adult ; Aged ; Aged, 80 and over ; *Body Mass Index ; Calcium/*analysis ; Coronary Angiography/*methods ; Coronary Vessels/*chemistry ; *Electrocardiography ; Female ; *Heart Rate ; Humans ; Male ; Middle Aged ; Observer Variation ; Prospective Studies ; Tomography, X-Ray Computed/*methods

PURPOSE: To examine the influence of ovariectomy (OVX) on bone turnover and trabecular bone mass at the 3 clinically important skeletal sites in mature cynomolgus monkeys. MATERIALS AND METHODS: Six female cynomolgus monkeys, aged 17-21 years, were randomized into 2 groups by the stratified weight: the OVX and sham-operation groups (n = 3 in each group). The experimental period was 16 months. Lumbar bone mineral density (BMD) in vivo and serum and urinary bone turnover markers were longitudinally measured, and peripheral quantitative computed tomographic and bone histomorphometric analyses were performed on trabecular bone of the lumbar vertebra, femoral neck, and distal radius at the end of the experiment. RESULTS: OVX induced in a reduction in lumbar BMD compared with the sham controls and the baseline, as a result of increased serum levels of bone-specific alkaline phosphatase and urinary levels of cross-lined N- and C-terminal telopeptides of type I collagen. Furthermore, OVX induced reductions in trabecular volumetric BMD and trabecular bone mass compared with the sham controls, with increased bone formation rate at the lumbar vertebra, femoral neck, and distal radius. CONCLUSION: The results indicated that OVX in mature cynomolgus monkeys (17-21 years of age) increased bone turnover and induced trabecular bone loss at the three skeletal sites compared with the sham controls. Thus, mature cynomolgus monkeys could be utilized for preclinical studies to examine the effects of interventions on bone turnover and trabecular bone mass at the 3 clinically important skeletal sites.
Alkaline Phosphatase/blood ; Animals ; *Bone Density ; Collagen Type I/urine ; Female ; Femur Neck/metabolism ; Lumbar Vertebrae/metabolism ; Macaca fascicularis/*physiology ; Ovariectomy/*adverse effects ; Radius/metabolism ; Random Allocation

BACKGROUND/AIMS: There have been several reports of thermal injury induced by argon plasma coagulation (APC) in animal models, but no follow-up studies have revealed the actual thermal injury. METHODS: APC was performed on the stomachs of two living minipigs with and without prior submucosal injection of normal saline. The power and argon gas flow were set to 60 watts and 2 L/min, respectively, and pulse durations of 5, 10, and 20 seconds were used. One of the minipigs was killed immediately thereafter and the other was killed 1 week later. RESULTS: The minipig killed immediately showed only subtle differences between noninjected and injected injuries under all the conditions, and the usefulness of prior submucosal injection was not obvious. However, the minipig killed 1 week later had a deep ulcer extending to the deeper muscle layer at the noninjected site where APC had been applied for 20 seconds, whereas tissue injury of the injected site was limited to the submucosal layer. CONCLUSIONS: Unexpected tissue damage can occur even using a short-duration APC. Prior submucosal injection for APC might be a safer alternative technique, especially in a thinner and narrower gut wall.
Argon ; Argon Plasma Coagulation ; Models, Animal ; Muscles ; Stomach ; Swine, Miniature ; Ulcer

[Objective] We report a successfully treated case by a combined therapy of acupuncture and Kampo medicine for a patient with lower limb pain associated with Guillain-Barre syndrome (GBS).[Case] The patient was a 74-year-old man whose chief complaints were severe lower limb pain, gait difficulty, and hyposthenia. Clinical history: In late September in X year, the patient had a cold infection. On October 14, he became aware of weakness in his lower limbs on both sides, difficulty in walking, and severe pain in his lower limbs. He visited our hospital's general internal medicine department and was diagnosed with GBS. The patient was hospitalized and started to receive intravenous immunoglobulin therapy for GBS. Since pain in the lower limbs continued after treatment, he received analgesics, which was not effective. Therefore, acupuncture treatment was started on October 30 aiming to alleviate lower limb pain. Evaluation: Pain and burning sensation were evaluated using a numerical rating scale (NRS), and Hughes' function grade scale (FG) as an objective evaluation. [Acupuncture treatment] The acupuncture treatment was based on Chinese medicine. The basic combination of meridian points for treatment of the case were LR3 (Taichong), LI4 (Hegu), KI6 (Zhaohai), KI3 (Taixi), ST36 (Zusanli), PC6 (Neiguan), and SI8 (Xiaohai). The patient received acupuncture treatments once a day for 12 weeks.[Progress] The first evaluation of the patient's pain in his lower limbs on both sides was 10 points in NRS and 4 units in FG. Pain was alleviated immediately after acupuncture treatment was started, and a significant improvement in pain was observed by the seventh acupuncture treatment. However, the　patient started to complain of burning sensation on his soles. Therefore, the combined use of Kampo medicine (Choutousan, Rokumijiougan) were introduced in addition to the acupuncture treatment, and his burning sensation disappeared. Since then, rehabilitation was enhanced, and after three months from the start of acupuncture treatment, he was discharged since the FG was improved to 2 units. [Discussion] Lower limb pain and burning sensation in this case were considered to be neuropathic pain associated with GBS, and conventional analgesics were only temporarily effective. In contrast, the combined use of acupuncture and Kampo medicine alleviated the pain and burning sensation, and ADL was improved. Acupuncture and Kampo medicine were effective for lower limb pain and burning sensation from GBS.