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Transcranial Sonography (transcranial + sonography)

Distribution by Scientific Domains
Medical Sciences100%

Selected Abstracts

Recovery of Reversed Basilar Artery Flow as Seen by Transcranial Sonography and MRA Source Images for Vertebral Dissection

JOURNAL OF NEUROIMAGING, Issue 4 2008
Sung Ik Lee MD
ABSTRACT The dissection of the intracranial vertebral artery (VAD) is a common cause of young age brain stem stroke. VAD can be detected by conventional angiography, but there is yet no agreement on the most effective tool to use for the detection of VAD. Here, we report a patient with VAD, who was diagnosed with an intimal flap within the left vertebral artery by the magnetic resonance angiography (MRA) source images. Transcranial Doppler (TCD) showed a reversed flow in the basilar artery. After 4 months, TCD and transcranial color-coded Doppler (TCCD) confirmed a normal anterograde flow of the vertebro-basilar arteries. [source]

Distinguishing Parkinson's disease and essential tremor with transcranial sonography

ACTA NEUROLOGICA SCANDINAVICA, Issue 1 2009
M. Budisic
Objectives,,, Until today there is no reliable test that can clearly distinguish Parkinson's disease (PD) from the essential tremor (ET). Our aim was to determine the usefulness of the transcranial sonography (TCS) in the differential diagnosis of the PD and ET as well as the interobserver reliability for this method. Methods,,, Transcranial sonography of substantia nigra and clinical examination were performed on 80 PD patients, 30 ET patients, and 80 matched controls by two independent physicians. Results,,, Bilateral SN hyperechogenicity over the margin of 0.20 cm2 was found in 91% of PD patients, 10% of healthy subjects, and in 13% patients with ET. Interobserver agreement for this method was significant (Student's t -test, P = 1.000). Conclusions,,, Substantia nigra hyperechogenicity on TCS is a highly specific finding of PD, where in healthy individuals or in ET patients, it might correspond to an increased risk of developing PD later in life or might also be because of the impairment of nearby area of nucleus ruber in ET patients, as suggested by positron emission tomography studies. TCS may serve as a practical and sufficiently sensitive neuroimaging tool in PD diagnoses and in distinguishing it from ET; its repeatability and accuracy might add to its practical value. [source]

Olfactory loss may be a first sign of idiopathic Parkinson's disease

MOVEMENT DISORDERS, Issue 6 2007
Antje Haehner MD
Abstract Recent studies support the idea of olfactory dysfunction as a very early sign of idiopathic Parkinson's disease (IPD). Aim of the present study was to clinically follow-up patients with idiopathic hyposmia to find out the percentage of patients developing IPD after 4 years time. At baseline, olfactory tests had been combined with transcranial sonography of the substantia nigra and 123I-FP-CIT SPECT imaging. At the present neurological examination, 7% of the individuals with idiopathic hyposmia had developed clinical IPD. Altogether, 13% presented with abnormalities of the motor system. Our data suggest that a combination of olfactory testing and other tests may constitute a screening tool for the risk to develop IPD. © 2007 Movement Disorder Society [source]

Predictive value of transcranial sonography in the diagnosis of Parkinson's disease

MOVEMENT DISORDERS, Issue 10 2006
Jürgen Prestel MD
Abstract Transcanial sonography (TCS) is increasingly applied in the diagnosis of Parkinson's disease (PD), but investigator bias may influence the results of examination. Blinding the sonographer to the clinical diagnosis of 42 PD patients and 35 controls, we obtained a positive predictive value of 85.7% and a negative predictive value of 82.9% in the diagnosis of PD solely by interpreting the results of TCS, indicating that TCS is a valuable additional tool in the diagnosis of PD. © 2006 Movement Disorder Society [source]

Distinguishing Parkinson's disease and essential tremor with transcranial sonography

ACTA NEUROLOGICA SCANDINAVICA, Issue 1 2009
M. Budisic
Objectives,,, Until today there is no reliable test that can clearly distinguish Parkinson's disease (PD) from the essential tremor (ET). Our aim was to determine the usefulness of the transcranial sonography (TCS) in the differential diagnosis of the PD and ET as well as the interobserver reliability for this method. Methods,,, Transcranial sonography of substantia nigra and clinical examination were performed on 80 PD patients, 30 ET patients, and 80 matched controls by two independent physicians. Results,,, Bilateral SN hyperechogenicity over the margin of 0.20 cm2 was found in 91% of PD patients, 10% of healthy subjects, and in 13% patients with ET. Interobserver agreement for this method was significant (Student's t -test, P = 1.000). Conclusions,,, Substantia nigra hyperechogenicity on TCS is a highly specific finding of PD, where in healthy individuals or in ET patients, it might correspond to an increased risk of developing PD later in life or might also be because of the impairment of nearby area of nucleus ruber in ET patients, as suggested by positron emission tomography studies. TCS may serve as a practical and sufficiently sensitive neuroimaging tool in PD diagnoses and in distinguishing it from ET; its repeatability and accuracy might add to its practical value. [source]