A b s t r a c t : A new i n t e n s e focused u l t r a s o u n d system o p e r a ti n g i n t h e transcutaneous mode has been c o n s t r u c t e d f o r s t u d y o f i t s u t i l i t y i n t h e t r e a t m e n t o f deep seated b r a i n tumors i n t h e human. I n p r e p a r a t i o n f o r t r e a t m e n t t h e human w i l l have s u r g i c a l removal o f an a p p r o p r i a t e s k u l l s e c t i o n and t h e o v e r l y i n g t i s s u e s w i l l be l e f t t o heal b e f o r e s t a r t i n g t h e i r r a d i a t i o n process. t r e a t m e n t w i l l be done w i t h CT scanning i n v o l v i n g a r i g i d l i g h t w e i g h t s k u l l f i x a t i o n f i x t u r e which remains r i g i d l y a t t a c h e d t o t h e p a t i e n t ' s s k u l l f o r t h e CT scan as w e l l as f o r t h e i r r a d i a t i o n procedure. Once t h e l e s i o n volume c o o r d i n a t e
s a r e determined and t h e p a t i e n t i s a t t a c h e d t o t h e i r r a d i a t i o n system t h e 1 MHz focused beam i s a u t o m a t i c a l l y b r o u g h t t o an a r r a y o f p o s i t i o n s w i t h i n t h eI. I n t r o d u c t i o n : Focused u l t r a s o u n d has been used t o produce b r a i n l e s i o n s i n experimental animals and i n humans d u r i n g c l i n i c a l s t u d i e s . These s t u d i e s have demonstrated t h e a b i l i t y o f u l t r a s o u n d t o focus e s s e n t i a l l y a t any p r e s e l e c t e d b r a i n s i t e and t o ab1 a t e t h e t i s s u e r e s t r i c t e d t o t h e se1 e c t e d f o c a l s i t e . Because o f s k u l l bone impediment t o u l t r asound t r a n s m i s s i o n s most o f t h e s t u d i e s have been performed w i t h s k u l l bone removed, and t h e i r r a di a t i o n p e r f o m e d t r a n s d u r a l l y o r t
The following topics are discussed in this article. A historical review of the evolution of breast cancer imaging from thermography through digital breast tomosynthesis, molecular breast imaging, and advanced breast magnetic resonance imaging. Discussion of multiple clinical trials, their strengths, and weaknesses. Historical perspective on the Mammography Quality Standards Act and its relationship with development and implementation of the Breast Imaging-Reporting and Data System (BI-RADS).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.