[en] A first prototype of optical scanner based on a CCD camera and the use of Fricke-agarose-XO has allowed us to reconstruct 3D dose maps, monitoring doses in the range 0.5-3 Gy. Measurements performed with laboratory tests and with clinical beams would indicate that the uncertainty involved in dose mapping are compatible with requirements of a 3D dosimetry for the verifications of treatment plans.

[en] To identify frequent MRI features of parathyroid adenomas (PTAs) in patients with primary hyperparathyroidism (PHPT) using a fast protocol with a 3 T magnet. Thirty-eight patients with PHPT underwent a 3 T-MR. All patients had positive US and Tc-99 sestamibi, for a total number of 46 PTAs. T2-weighted IDEAL-FSE and T1 IDEAL-sequences, before and after contrast, were performed. Five features of PTAs were recognised: hyperintensity, homogeneous or ''marbled'' appearance and elongated morphology on T2-sequences; cleavage plane from thyroid gland on T2-outphase; rapid enhancement in post-contrast T1. Image quality for T2-weighted IDEAL FSE and usefulness for IDEAL post-contrast T1-weighted and T2-outphase sequences were also graded. PTAs were hyperintense in T2-sequences in 44/46 (95.7 %), ''marbled'' in 30/46 (65.2 %) and elongated in 38/46 (82.6 %) patients. Cleavage plane was observed in 36/46 (78.3 %), and rapid enhancement in 20/46 (43.5 %) patients. T2-sequences showed both excellent fat suppression and image quality (average scores of 3.2 and 3.1). T2-outphase images demonstrated to be quite useful (score 2.8), whereas, post-contrast T1 images showed a lower degree of utility (score 2.4). A fast protocol with 3.0-T MRI, recognising most common features of PTAs, may be used as a second-line method in the preoperative detection of PTAs. (orig.)