TAILIEUCHUNG - Physics in Nuclear Medicine Second Edition

Reliable gene-lifestyle interaction studies will yield important evidence for the shaping of personalised healthcare. Studies need statistical power with adequate environmental exposures and lifestyle heterogeneity to obtain reliable evidence on the interplay between nurture and nature. Europe has a historic strength in large epidemiological studies but technology development and implementation is needed to better ascertain environmental exposure and dietary heterogeneity. There is a lack of information about the quality and quantity of biological samples of existing European cohorts and about the completeness and consistency of phenotype data. This type of information is required. | Physics in Nuclear Medicine Second Edition James A. Sorenson . Director Medical Physics Professor of Radiology Department of Radiology University of Utah Medical Center Salt Lake City Utah Michael E. Phelps . Jennifer Jones Simon Professor Chief Division of Nuclear Medicine and Biophysics Department of Radiological Sciences UCLA School of Medicine Chief Laboratory of Nuclear Medicine Laboratory of Biomedical and Environmental Sciences UCLA Los Angeles California . SAUNDERS COMPANY Harcourt Brace Jovanovich Inc. Philadelphia London Toronto Montreal Sydney Tokyo 16 The Anger Camera Performance Characteristics B. DESIGN AND PERFORMANCE CHARACTERISTICS OF PARALLEL-HOLE COLLIMATORS 1. Basic Limitations in Collimator Performance The collimator is a weak link for the performance of an Anger camera system as indeed it is in any nuclear medicine imaging system employing the principles of absorptive collimation. Collimator efficiency defined as the fraction of y rays striking the collimator that actually pass through it to project the y-ray image onto the detector is typically only a few percent or less. Collimator resolution which refers to the sharpness or detail of the y-ray image projected onto the detector also is rather poor generally worse than the intrinsic resolution of the camera detector and electronics. Because it is a limiting factor in camera system performance it is important that the collimator be designed carefully. Poor design can result only in poorer overall performance. Design considerations for parallelhole collimators will be discussed in this section. Design characteristics for converging and diverging collimators are similar to those of the parallel-hole type. Design characteristics of pinhole collimators will not be discussed in detail here but are described in references listed at the end of the chapter. The analysis to be presented for parallel-hole collimators 332 Physics in Nuclear Medicine is similar to that presented by Anger in .

• Y học thường thức
• gene lifestyle interaction
• exposures and lifestyle
• Cognitive Deficits
• Rodent Animal Models
• Neuropsychiatric Disorders
• diagnostic criteria
• BMC Pediatrics
• Fetal alcohol spectrum disorder
• Referral criteria
• Specialist diagnostic
• Central nervous system
• BMC Geriatrics
• Muscle mass
• Gait speed
• Handgrip strength
• Population sample
• Pharmacodynamics
• Medication Effects
• Differential Diagnosis
• Initial Evaluation
• Clinical Course
• Iron deficiency anemia
• Therapeutic modalities
• Pediatric hematologists
• Pediatric IDA
• Bacterial vaginosis
• Amsel’s criteria
• Neugent scoring
• Gynaecology clinics
• Different diagnostic methods
• Adolescent psychiatry
• Mental health
• Separation anxiety disorder
• Specific phobia
• Social phobia
• Generalized anxiety disorder
• BMC Musculoskeletal Disorders
• Long head of biceps tendon
• Magnetic resonance imaging
• Diagnostic efficacy
• Leasehold Interest
• Easements
• Functioning Alcoholics
• Emerging Adults
• Hitting Bottom
• Substance Dependence
• Alcohol Recovery
• Behavioral Tests
• Information Processing
• trình bày báo cáo
• tài liệu báo cáo khoa học
• báo cáo y học
• kiến thức y học
• nghiên cứu y học
• Basic Mechanisms
• EPIDEMIOLOGY
• Psychogenic dystonia
• Psychogenic gait
• psychogenic myoclonus
• Gastrointestinal cancer
• Reverse transcriptase PCR
• Gastrointestinal malignancies
• Cytokeratin 19
• Human telomerase reverse transcriptase
• Reverse transcriptase polymerase chain
• Chronic kidney disease
• Serum iron
• Serum ferritin
• Cross sectional
• Deficient erythropoietin
• Erythropoiesis stimulating agent
• Major depressive disorder
• Military unit
• Meta analysis
• Diagnostic criteria of DSM IV
• BMC Cancer
• Trauma and stressor related disorders
• Hematological malignancies
• Stem cell transplantation
• Patient reported outcomes
• Quality of life
• Perivascular epithelioid cell tumor
• Clear cell tumor
• Malignant potential pulmonary PEComa
• Solitary fibrous tumor
• Stable diseases
• Progressive diseases
• Screening tests
• Gestational diabetes in patients
• History of macrosomia
• Strong family history of diabetes
• Ventilator associated pneumonia
• Mortality prognostic factors
• Hospital acquired pneumonia
• Underlying diseases
• BMC Pulmonary Medicine
• Airflow obstruction
• Chronic obstructive pulmonary disease
• Lung function decline
• Primary care