Discordance between labelled white blood cell scintigraphy and bone scan following suspicion of bone infection: what should be done about it?

Background: Bone infection is a common issue in infectiology. The gold standard for evaluating bone infection is the white blood cell (WBC) scan. In our practice the WBC scan is coupled with a bone scan.

Sensory alien hand syndrome in corticobasal degeneration: a cerebral blood flow study.

The presence of alien hand syndrome (AHS) is suggestive of the diagnosis of corticobasal degeneration when it develops in a progressive way. Sensory AHS (sAHS) should be distinguished from the motor form described more commonly. The physiopathology of sAHS remains unclear.

Cerebral hemodynamic changes in severe head injury patients undergoing decompressive craniectomy.

Objective: To assess the intracranial hemodynamic modifications induced by a decompressive craniectomy (DC) after severe traumatic brain injury (TBI), using transcranial Doppler (TCD) ultrasonography and intracranial pressure (ICP) sensor. Mortality rate and neurological outcomes were also evaluated after this procedure.

Design: A prospective study was carried out on 26 TBI patients, measuring transcranial Doppler and ICP before, immediately after, and 48 hours after the DC, allowing for statistical analysis of hemodynamic changes.

Iterative three-dimensional expectation maximization restoration of single photon emission computed tomography images: application in striatal imaging.

Single photon emission computed tomography imaging suffers from poor spatial resolution and high statistical noise. Consequently, the contrast of small structures is reduced, the visual detection of defects is limited and precise quantification is difficult. To improve the contrast, it is possible to include the spatially variant point spread function of the detection system into the iterative reconstruction algorithm.

A SPECT study of wandering behavior in Alzheimer's disease.

Background: Among behavior disturbance during Alzheimer's disease (AD), wandering is one of the most common. Different psychological processes have been suggested to explain the wandering behavior. The aim of this study was to examine whether wandering during AD was associated with cerebral perfusion patterns measured by (99 m)Tc-labeled bicisate (ECD) brain SPECT.

Effectiveness of lymphoscintigraphic sentinel node detection for cervical staging of patients with squamous cell carcinoma of the head and neck.

Purpose: To evaluate the feasibility and staging ability of the sentinel node (SN) technique for patients with squamous cell carcinoma of the oral cavity or oropharynx and clinically negative necks. This prospective study compares the histopathologic status of the SN with that of the remaining neck dissection tissues.

Patients And Methods: Thirty previously untreated patients with T1 to T4 squamous cell carcinoma of the oral cavity or oropharynx and clinically negative necks (N0) were included in the study.

Multimodal image registration for localization of sentinel nodes in head and neck squamous cell carcinoma.

Purpose: The aim of this clinical study was to propose a new method of preoperative 3-dimensional localization of the neck sentinel node in clinically and radiographically N0 squamous cell carcinoma of the oral cavity.

Patients And Methods: This prospective study was carried out between August 2002 and August 2003. Ten patients with staged oral squamous cell cancer underwent this method of preoperative localization of the sentinel lymph node.

Confirmation by spiral CT of a partially occlusive thrombus of the right pulmonary artery suggested by a V/Q lung scan.

Findings on perfusion and ventilation imaging in a 24-year-old woman with anterior chest pain were consistent with pulmonary embolism involving the right lung. An astute physician raised the possibility of a thrombus occluding the right pulmonary artery, and subsequent spiral computed tomography confirmed the suspicion of an occluding thrombus at that site. Had spiral computed tomography been done first, the diagnosis would have been made much more rapidly.

Quantification of dopamine transporter by 123I-PE2I SPECT and the noninvasive Logan graphical method in Parkinson's disease.

Unlabelled: (E)-N-(3-iodoprop-2-enyl)-2beta-carbomethoxy-3beta-(4'-methyl-phenyl) nortropane (PE2I), a cocaine analog, is a new, highly specific tracer for imaging dopamine transporter labeled with (123)I for in vivo SPECT. Its reversible binding on dopamine transporter and its rapid kinetics allow quantification of its binding potential according to a 3-compartment model. For quantification of distribution volume of reversible tracer, Logan developed a noninvasive and graphical method that allows accurate estimation of binding potential.

Acupuncture meridians and radiotracers.

Acupuncture is frequently used and in particular for the treatment of pain. One of the cornerstones of its use, at least in Western countries, is the concept of the acupuncture meridian. Yet, their existence has never actually been proven.