Two commercially available (EP, Z) and eight new elastomeric composites (M1-M4, G1-G4, of thickness ≈1 mm) containing mixtures of differing proportions of heavy metal additives (Bi, W, Gd and Sb) have been synthesised and examined as protective shields. The intensity of the X-ray fluorescence radiation generated in the typical elastomeric shields for CT, containing Bi and other heavy metal addi...

1. Zimmerman LE, Garron LK. Melanocytoma of the optic disc. Int Ophthalmol Clin. 1962;2: 431-440. 2. Joffe L, Shields JA, Osher RH, Gass JD. Clinical and follow-up studies of melanocytomas of the optic disc. Ophthalmology. 1979;86:10671083. 3. Spencer WH. XXXIV Edward Jackson Memorial Lecture: drusen of the optic disc and aberrant axoplasmic transport. Ophthalmology. 1978;85:21-38. 4. Osher RH,...

Introduction: Ionizing radiation can cause damage to biologically important DNA molecules. Radiation in nuclear medicine radiation exposes people working in from two main positions; administer in gradiopharmaceuticals (the barn and squeezing a generator, procurement, distribution and drug infusion) and patients that receive radiation treatment (patients that are prescribed a ra...

Introduction: Coronary angiography (CA) is an interventional diagnostic procedure to assess cardiovascular disease. CA is performed using dedicated fluoroscopic systems equipped with either flat detector or image intensifier. There is an increase in the number of CA annually. Reducing the radiation exposure in the CA is essential, especially due to high fluoroscopy time. In ord...

In this paper we present an Image-Based Rendering method for post-warping LDI’s in real-time on existing systems. The algorithm performs accurate splatting at low computational costs, reduces memoryaccess bottlenecks, enables us to trade-off the quality for the speed, and is simple to implement.

P rotecting groups have a long history in synthetic chemistry 1. A protecting group is covalently attached to one functional group to block its reactivity while a second functional group undergoes a chemical transformation, after which the protecting group is then removed (Fig. 1a). The use of protecting groups requires both protection and deprotection steps, so efficiency considerations dictat...

tion of a pigmented neuroendocrine tumor. Arch Ophthalmol. 2000;118(6):841-845. 6. Mashayekhi A, Shields CL, Eagle RC Jr, Shields JA. Cavitary changes in retinoblastoma: relationship to chemoresistance. Ophthalmology. 2005;112(6):1145-1150. 7. Lois N, Shields CL, Shields JA, Eagle RC Jr, De Potter P. Cavitary melanoma of the ciliary body: a study of eight cases. Ophthalmology. 1998; 105(6):1091...

Introduction: The formation of Martian paterae is poorly understood. ÒTypicalÓ paterae are considered to be constructed primarily of pyroclastic deposits (e.g. Tyrrhena Patera [1], Hadriaca Patera [2], and Apollinaris Patera [3-4]), whereas others are suggested to be constructed primarily of numerous lava flows (e.g. Biblis and Ulysses Paterae [5] and Uranius Patera [6]). Alba Patera is interpr...