UNLV Contemporary Jazz Ensemble

list of performers and performances

The UNLV Jazz Ensemble II and III

Program listing performers and works performe

UNLV Jazz Ensemble II and III

Program listing performers and works performe

Las Vegas Academy Jazz Band III: A Celebration of Black History Month

Program listing performers and works performed

EXCESS PROFITS TAXATION IN 1941

The problems of business taxation are twofold: from the governmental standpoint, the problem is to obtain sufficient revenues at a minimum of cost and with the least resistance; from the business standpoint, the problem is to obtain lighter taxation where possible at a minimum of cost and with the greatest simplicity and uniformity. The excess profits tax has been devised by the economists of the several nations with the object of bolstering national taxing systems in extraordinary periods which demand abnormal revenues. With the advent of the excess profits tax, the desire for simplicity and low cost in taxation was smothered under the relatively complex provisions and administrative difficulties which accompany such a tax

Jazz Studies

Program listing performers and works performed

The UNLV Contemporary Jazz Ensemble & Jazz Ensemble I

Program listing performers and works performed

Spring Jazz Festival

List of performers and performances

Jazz Studies Concert Program

Program listing performers and works performe

Strengths and weaknesses of a planar whole-body method of 153Sm dosimetry for patients with metastatic osteosarcoma and comparison with three-dimensional dosimetry

Purpose: Dosimetric accuracy depends directly upon the accuracy of the activity measurements in tumors and organs. The authors present the methods and results of a retrospective tumor dosimetry analysis in 14 patients with a total of 28 tumors treated with high activities of (153)Sm-ethylenediaminetetramethylenephosphonate ((153)Sm-EDTMP) for therapy of metastatic osteosarcoma using planar images and compare the results with three-dimensional dosimetry. Materials and Methods: Analysis of phantom data provided a complete set of parameters for dosimetric calculations, including buildup factor, attenuation coefficient, and camera dead-time compensation. The latter was obtained using a previously developed methodology that accounts for the relative motion of the camera and patient during whole-body (WB) imaging. Tumor activity values calculated from the anterior and posterior views of WB planar images of patients treated with (153)Sm-EDTMP for pediatric osteosarcoma were compared with the geometric mean value. The mean activities were integrated over time and tumor-absorbed doses were calculated using the software package OLINDA/EXM. Results: The authors found that it was necessary to employ the dead-time correction algorithm to prevent measured tumor activity half-lives from often exceeding the physical decay half-life of (153)Sm. Measured half-lives so long are unquestionably in error. Tumor-absorbed doses varied between 0.0022 and 0.27 cGy/MBq with an average of 0.065 cGy/MBq; however, a comparison with absorbed dose values derived from a three-dimensional analysis for the same tumors showed no correlation; moreover, the ratio of three-dimensional absorbed dose value to planar absorbed dose value was 2.19. From the anterior and posterior activity comparisons, the order of clinical uncertainty for activity and dose calculations from WB planar images, with the present methodology, is hypothesized to be about 70%. Conclusion: The dosimetric results from clinical patient data indicate that absolute planar dosimetry is unreliable and dosimetry using three-dimensional imaging is preferable, particularly for tumors, except perhaps for the most sophisticated planar methods. The relative activity and patient kinetics derived from planar imaging show a greater level of reliability than the dosimetry