The estimation of lung dose from mid-perineum ionization chamber measurements in total body irradiations: A quality control check on dose delivery

1995 ◽  
Vol 39 (4) ◽  
pp. 384-386
Author(s):  
Peter Cross
Keyword(s):  
Quality Control ◽  
Ionization Chamber ◽  
Dose Delivery ◽  
Lung Dose ◽  
Quality Control Check ◽  
Total Body ◽  
Chamber Measurements

scholarly journals EP-1829: Dose delivery accuracy in total body irradiation delivered with Step and Shoot IMRT

2017 ◽  
Vol 123 ◽  
pp. S1001-S1002
Author(s):  
T. Berlon ◽  
L. Specht ◽  
P.M. Petersen ◽  
L.S. Fog
Keyword(s):  
Total Body Irradiation ◽  
Dose Delivery ◽  
Step And Shoot ◽  
Total Body ◽  
Delivery Accuracy

Fig. 9 Freeze fracture electron micrograph of ELimixed phosphoinositides (4:1) liposomes after 10 passes through a0.1 pirn polycarbonate filter. growth, particularly during storage, would be undesirable in most products. Fortunately the tendency of liposomes to aggregate and fuse can be controlled by the inclusion of small amounts of negatively charged lipids such as PS or PG or positively charged amphiphiles such as stearylamine in the formulation. Knowing the number and the sign of charged groups added and the valency and concentration of electrolytes in the me-dium, the magnitude of the electrostatic forces generated by these charged groups can be closely approximated by using the double layer theory. These results can then be correlated with physical stability of liposomes and used to guide formulation efforts. The amount of charged component and ionic conditions in a particular liposome dos-age form can be adjusted to produce a high-enough zeta potential to inhibit close ap-proach of vesicles and prevent their aggregation. In practice it is usually necessary to determine empirically the magnitude of the zeta potential required to prevent aggrega-tion in a particular system. However, once this has been done, it is possible to use the zeta potential as a quality control check to insure that each batch of liposomes contains sufficient charged groups to avoid aggregation during storage.

1998 ◽  
pp. 84-108
Keyword(s):  
Quality Control ◽  
Zeta Potential ◽  
Physical Stability ◽  
Freeze Fracture ◽  
Electron Micrograph ◽  
Electrostatic Forces ◽  
Quality Control Check ◽  
Charged Component ◽  
Fracture Electron ◽  
Positively Charged

Cable-induced effects on plane-parallel ionization chamber measurements in large clinical electron beams

1994 ◽  
Vol 19 (2) ◽  
pp. 73-76 ◽  
Author(s):  
Claudio Fiorino ◽  
Giovanni Mauro Cattaneo ◽  
Antonella Del Vecchio ◽  
Marcello Fusca ◽  
Barbara Longobardi ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Electron Beams ◽  
Plane Parallel ◽  
Chamber Measurements

Consistency of Myocardial Mass Computations as a Quality Control Check on Rest and Stress Left Ventricular Ejection Fractions Computed From 82Rb PET Data

2014 ◽  
Vol 39 (7) ◽  
pp. 593-597 ◽  
Author(s):  
Andrew Van Tosh ◽  
Nathaniel Reichek ◽  
Barbara Phippen-Nater ◽  
Christopher J. Palestro ◽  
Kenneth J. Nichols
Keyword(s):  
Quality Control ◽  
Left Ventricular ◽  
Ventricular Ejection ◽  
Left Ventricular Ejection ◽  
Myocardial Mass ◽  
Quality Control Check

scholarly journals Mitochondrial quality control and neurological disease: an emerging connection

2010 ◽  
Vol 12 ◽  
Author(s):  
Inês Pimenta de Castro ◽  
L. Miguel Martins ◽  
Roberta Tufi
Keyword(s):  
Quality Control ◽  
Total Body Weight ◽  
High Rate ◽  
Control Mechanisms ◽  
Mitochondrial Quality Control ◽  
Stress Control ◽  
Energy Demands ◽  
Total Body ◽  
The Brain ◽  
Complex Organ

The human brain is a highly complex organ with remarkable energy demands. Although it represents only 2% of the total body weight, it accounts for 20% of all oxygen consumption, reflecting its high rate of metabolic activity. Mitochondria have a crucial role in the supply of energy to the brain. Consequently, their deterioration can have important detrimental consequences on the function and plasticity of neurons, and is thought to have a pivotal role in ageing and in the pathogenesis of several neurological disorders. Owing to their inherent physiological functions, mitochondria are subjected to particularly high levels of stress and have evolved specific molecular quality-control mechanisms to maintain the mitochondrial components. Here, we review some of the most recent advances in the understanding of mitochondrial stress-control pathways, with a particular focus on how defects in such pathways might contribute to neurodegenerative disease.

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