Faustino C. Guinto

Correlation Between Facial Pain or Headache and Computed Tomography in Rhinosinusitis in Canadian and U.S. Subjects

Objectives Objectives were 1) to determine whether a correlation exists between facial pain or headache and sinus disease severity by computed tomography (CT) scan in patients with rhinosinusitis and 2) to compare disease severity and pain perception in two geographically diverse North American patient populations.

Magnetic Resonance Imaging after Closed Head Injury in Children

Magnetic resonance imaging (MRI) was performed in a series of 21 children and adolescents who had been hospitalized after sustaining closed head injuries of varying severity at least 6 months previously. Areas of high intensity in the parenchyma were present in 8 of the 11 severely injured patients, whereas MRI findings were normal in all 10 patients with mild-to-moderate head injuries. Lesions involving the subcortical white matter were confined to severely injured patients whose clinical features were compatible with diffuse axonal injury. Neuropsychological assessment disclosed deficits primarily in the severely injured patients; these deficits were significantly associated with persistent lesions visualized by MRI. Serial MRI and neurobehavioral assessment following early injury may be useful in documenting cognitive impairment in relation to structural alterations of the young brain.

Gender differences in source location for the N100 auditory evoked magnetic field

Auditory evoked magnetic fields were recorded in response to contralateral stimulation over the right hemisphere in 6 adult males and 6 adult females. The data were fit to a model of a current-dipole source in a homogeneous sphere and 5 parameters of the dipole were computed--3 spatial coordinates, orientation, and strength. When average values for the dipole parameters were compared between sexes, it was found that the current source for the N100m is located more than 1 cm posterior in females and is oriented pointing more downward. These findings were replicated in separate measurement sessions. Viewing of individual magnetic resonance images did not reveal a corresponding anatomical disparity in the location of the primary auditory cortex which is assumed to produce the N100m. Therefore, functional organization of the auditory cortex may be different for the sexes.

Postoperative atrophy of posterolateral chest wall musculature : CT demonstration

We review five cases in which CT demonstrated severe unilateral atrophy of the latissimus dorsi muscle. In four of these cases, similar findings were also seen in the inferior portion of the serratus anterior muscle. All patients had undergone thoracic surgery on the ipsilateral side 10 months to 3 1/2 years prior to CT. All patients had undergone posterolateral thoracotomy, including one who had undergone successive right and left posterolateral thoracotomies. The most likely explanation for the CT finding of atrophy is denervation injury resulting from surgical incision. We discuss normal innervation of the posterolateral chest wall musculature, with emphasis on the relationship of unilateral atrophy of posterolateral chest wall musculature to previous surgical incision. Index Terms: Muscles, atrophy—Thorax—Surgery—Thoracotomy—Computed tomography.

Dynamic computed tomography scanning with combined metrizamide and arterial bolus injection in arteriovenous malformation of the spinal cord

Combined intrathecal metrizamide and arterial injection of contrast medium during dynamic computed tomography scanning was used to define the morphology and topographic aspects of a thoracic arteriovenous malformation. The information obtained from this new technique was decisive in establishing the operability of the lesion.

Normal in vivo eye dimensions by computed tomography.

In Win measurements of the eye were obtained in 55 normal adults using computed tomography. Means and standard deviations were established for the maximum transverse and the maximum anteroposterior dimensions. Our data indicate that the widely used methods of Sweet and Pfeiffer-Comberg (for intraorbital foreign body localization) underestimate the actual in vivo dimensions of the eye.

Combined CT metrizamide syringography and needle aspiration of cystic intramedullary spinal cord lesions

A modified spinal cord puncture technique that was combined with CT metrizamide syringography for the evaluation of potentially cystic spinal cord lesions has been used in 5 patients. This procedure proved to be safe and efficacious in the preoperative differentiation of cystic neoplasms from syringohydromyelia. It also aided in planning a surgical approach by revealing details of the tumor location and/or syrinx dynamics. Spinal cord puncture associated with CT metrizamide syringography has a role in the diagnosis and therapy of patients with cystic spinal cord lesions.

Unusual subclavian steal: bidirectional and antegrade blood flow in the vertebral artery

We present an unusual radiographic manifestation of subclavian steal seen in six patients. These cases differ from the classic form of subclavian steal in that antegrade and bidirectional blood flow in the vertebral-subclavian antery system in seen, resulting in the steal phenomenon.

Infantile right hemisphere injury: a case report with MRI and 13 year follow-up

Serial neuropsychological findings were obtained in a case of infantile right parietal injury who was studied over a 13 year follow-up period. Magnetic resonance imaging at age 13 years documented extensive injury to the right hemisphere, particularly the parietal region. Serial examinations at age 7 and 13 years showed intact visual attention, normal expression and processing of affect and variable visuospatial abilities. However, intellectual development was generally depressed. Implications of these findings for recovery from early brain injury are discussed.