1. TRANSCOSTAL PHASED-ARRAY REFOCUSING USING ITERATIVE SPARSE OPTIMIZATION AND THE SEMIDEFINITE RELAXATION METHOD Open Access Author: Mcmahon, Daniel F Title: TRANSCOSTAL PHASED-ARRAY REFOCUSING USING ITERATIVE SPARSE OPTIMIZATION AND THE SEMIDEFINITE RELAXATION METHOD Area of Honors: Electrical Engineering Keywords: UltrasoundHIFUOptimizationTranscostalNoninvasiveCancer Therapy File: Download DanielMcMahonThesisRevised.pdf Thesis Supervisors: Mohamed Khaled Almekkawy, Thesis SupervisorDr. Julio V. Urbina, Thesis Honors Advisor