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Adequate dose management during computed tomography is important. In the present study, the dosimetric application software ImPACT was added to a functional calculator of the size-specific dose estimate and was part of the scan settings for the auto exposure control (AEC) technique. This study aimed to assess the practicality and accuracy of the modified ImPACT software for dose estimation. We compared the conversion factors identified by the software with the values reported by the American Association of Physicists in Medicine Task Group 204, and we noted similar results. Moreover, doses were calculated with the AEC technique and a fixed-tube current of 200 mA for the chest-pelvis region. The modified ImPACT software could estimate each organ dose, which was based on the modulated tube current. The ability to perform beneficial modifications indicates the flexibility of the ImPACT software. The ImPACT software can be further modified for estimation of other doses.

The patient was a 59-year-old woman in whom computed tomography revealed a posterior mediastinal cyst and ovarian cystoma at a medical check-up in March 2007. Blood tests showed high CA19-9 and CA125 levels. She underwent left adnexectomy for ovarian cystoma in July 2008 and histopathological examination led to a diagnosis of dermoid cyst. The postoperative levels of CA19-9 and CA125 remained high. She developed dysphagia in February 2009, and the posterior mediastinal cyst showed a tendency to enlarge. Therefore, she underwent tumorectomy through a small thoracotomy. The cyst contained greenish fluid with CA19-9 and CA125 contents of 65,000 and 78,000 U/ml, respectively. Histologically, the cyst had a thickened wall, which contained two muscle layers, and was lined by squamous and pseudostratified ciliated epithelium. No cartilage or bronchial glands were identified. These findings led to a diagnosis of esophageal cyst. On immunohistochemical staining, the cyst-lining epithelial cells were positive for CA19-9 and CA125. The serum CA19-9 and CA125 levels returned to normal two months after surgery. We report a resected case of esophageal cyst producing CA19-9 and CA125.

Caryopses with horizontally oriented primary roots of Zea mays L. exposed to light, were incubated in magnetic fields. The gravitropic curvature of roots incubated in a field of 50 μ gauss was larger than the control value, while the control roots grew more rapidly