Thyroid Gland
Fig. 7.1 Hyperplastic follicular lesion histologically proven. (a) At baseline ultrasound the lesion appears iso-hypoechoic with peripheral halo sign. (b1, b2) At power Doppler and at Advanced Dynamic Flow™ (ADF),…
Technical and Physical Aspects
Fig. 1.1 Exemplification of the pure stress (arrows) applied on the surface of a rectangular shaped homogeneous medium, which deforms it maintaining its volume. The blue line on the diagram…
The Physics of Stereotactic Radiosurgery
Fig. 4.1 The electromagnetic spectrum is illustrated. Therapeutic X-ray or ionizing radiation is in the energy range of 105 eV and higher. The energy of photon beams commonly used in…
Radiobiological Principles Underlying Stereotactic Radiation Therapy
Fig. 5.1 Hypoxic regions (black) indicated by pimonidazole staining are present even in small tumors. Imaged here is a section of a small tumor derived from a human glioma xenograft…
Treatment Planning for Stereotactic Radiosurgery
Fig. 6.1 The basic steps in SRS treatment planning Stereotactic Localization Because SRS involves the delivery of a very high dose of radiation in either a single delivery or a…
Meningioma
Tumor size SRS (%) SRT (%) Total (%) Decreased 22 (34.9) 24 (33.3) 46 (34.1) No change 36 (57.1) 46 (63.8) 82 (60.7) Increased 5 (7.9) 2 (2.7) 7 (5.2)…
Ocular and Orbital Lesions
Fig. 62.1 (a) Example of invasive eye fixation by applying two sutures in the rectus muscles and attaching these sutures to the Leksell stereotactic frame. (b) Example of noninvasive eye…
Acoustic Tumors: Viewpoint—Stereotactic Radiotherapy
Fig. 25.1 Graph illustrating the effect of fractionation on the cell survival of tumor cells (A) as well as normal cells (B). Since normal cells have intact repair mechanisms, whereas…
Patient Care in Stereotactic Radiosurgery
1. Introduction to facility Date: Initial: a. Physical layout b. Supply areas c. Location of offices d. Location of hospital and unit manuals e. Medication stock and narcotics f. ECG,…
Designing, Building, and Installing a Stereotactic Radiosurgery Unit
Fig. 7.1 The original model U GK unit as installed in the USA in the late 1980s. (a) The side view of the unit and couch; (b) the helmet collimator…
