o bjective: to determine the etiology, signs and symptoms, angiography indications and angiography findings in patients with limb penetrating injuries suspected to have arterial injury. m e thods: this was a cross-sectional study being performed in imam reza hospital affiliated with mashhad university of medical sciences, iran between september 2011 and march 2013. we included those patients wi...

background sphenoid sinus is surrounded by many vital vascular and nervous structures. in more than 20% of patients with chronic sinusitis, involvement of sphenoid sinus has been observed. besides, sphenoid sinus is an appropriate route to access anterior and middle cranial fossa in surgery. therefore, it is important to have an adequate knowledge about the contents of sphenoid sinus and its pr...

Over a 14-month period at Boston City Hospital, 93 consecutive patients who had received a blunt or penetrating extremity injury in proximity to a major vascular structure were evaluated. All patients were totally asymptomatic and underwent arteriography for proximity as a sole indication. Twenty-seven patients (27%) were found to have abnormal arteriograms. Muscular branches of the profunda fe...

The brachial plexus which innervates the upper limb has afferent from cervical and thoracic part of spinal cord. Due to its proximity other important vascular nervous structures, is mainly responsible for post block complications like temporary paralysis phrenic, recurrent laryngeal nerves or Horner's syndrome .

The inability to answer proximity queries efficiently for spaces of dimension d > 2 has led to the study of approximation to proximity problems. Several techniques have been proposed to address different approximate proximity problems. In this paper, we present a new and unified approach to proximity searching, which provides efficient solutions for several problems: spherical range queries, id...

OBJECTIVE To determine the etiology, signs and symptoms, angiography indications and angiography findings in patients with limb penetrating injuries suspected to have arterial injury. METHODS This was a cross-sectional study being performed in Imam Reza Hospital affiliated with Mashhad University of Medical Sciences, Iran between September 2011 and March 2013. We included those patients with ...

Lemma 2.2. It suffices to find disjoint L,R ∈ V such that they are (1) Large in Ω(n), or more formally stated, |L||R| ≥ α(n). (2) ∆-separated for ∆ = Ω( 1 logn) Let us define what ∆-separated means so that we can formalize this notion of “farness”. Recall that a distance from a vertex i to a set S is defined as d(i, S) = minj∈S d(i, j) (distance to the closest point in the set) and a distance f...

Finding the closest or farthest line segment (line) from a point are fundamental proximity problems. Given a set S of n points in the plane and another point q, we present optimal O(n logn) time, O(n) space algorithms for finding the closest and farthest line segments (lines) from q among those spanned by the points in S. We further show how to apply our techniques to find the minimum (maximum)...