Disappearance elicited by contrast decrements
نویسندگان
چکیده
منابع مشابه
Myocardial contrast two-dimensional echocardiography: comparison of contrast disappearance rates in normal and underperfused myocardium.
A computer algorithm was developed and applied to measure brightness decay rates of myocardial contrast opacification observed with two-dimensional echocardiography (2DE). An agitated mixture of diatrizoate meglumine and saline (Renografin-saline) was injected into the left main coronary artery of 17 closed-chest dogs during the control state as well as after placement of an intracoronary plug ...
متن کاملQuantifying Cognitive Decrements Caused by Cranial Radiotherapy
With the exception of survival, cognitive impairment stemming from the clinical management of cancer is a major factor dictating therapeutic outcome. For many patients afflicted with CNS and non-CNS malignancies, radiotherapy and chemotherapy offer the best options for disease control. These treatments however come at a cost, and nearly all cancer survivors (~11 million in the US alone as of 20...
متن کاملAttentional Capture by Sound Disappearance
Three experiments are reported in which the attentional capture effect of sound disappearance was assessed. In all experiments participants were required to judge the pitch of target sounds that were preceded by one or more context sounds. In Experiments 1 and 2, targets presented in the same location as a context sound that had abruptly terminated 100 ms before its presentation, were identifie...
متن کاملSubtle disturbances of vision after optic neuritis elicited by studying contrast sensitivity.
Eight patients with a subjective disorder of vision yet normal Snellen acuities after optic neuritis were shown to have an abnormal contrast sensitivity function in their affected eye. It appears that certain disorders of vision are associated with an abnormality of the contrast sensitivity function in spite of near normal visual acuity. Such an abnormality may affect pattern recognition withou...
متن کاملSpatial sensitization of increments and decrements: A border-contrast process and a net-excitation process
We investigated the spatially local factors that adjust the sensitivity of the human visual system within a small patch of visual space. A very small adapting field was varied in diameter to map out the strength and extent of the spatially local processes that adjust sensitivity for both increments and decrements. The results demonstrated antagonistic center/surround adaptation regions with a d...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Perception & Psychophysics
سال: 2003
ISSN: 0031-5117,1532-5962
DOI: 10.3758/bf03194812