Functional magnetic resonance imaging

suppressing the MR signal intensity . The change in the MR signal, because of the neuronal activity is termed as Hemodynamic Response (HDR). Functional Magnetic Resonance Imaging (fMRI) is a technique used to visualize…

The modern brain-imaging techniques have provided the opportunities for the psychologist to investigate the active brain. The brain-imaging technologies are useful in neuropsychology as they allow the researchers to examine the active brain. The brain-imaging technologies also enable the researchers to see where specific brain activities happen, therefore to study the localisation of function in the living brain. The correlations between activity and behaviour can be provided as well, even…

the neural mechanisms, which are responsible for underlying cognition. These neural mechanisms are also important when it comes to manifestations in behaviour. Cognitive neuroscience helps to combine the works of cognitive science and cognitive psychology. However, it is important to consider how internal physical processes can initiate mental processes. Recently, cognitive neuroscience has introduced methodological advances that enable experiments to be taken place safely in a laboratory.…

Like any other cells in the body, when neurons are activated they consume glucose and oxygen to fuel their activity and they produce metabolic waste. According to Sadock, Sadock, and Ruiz (2015), a functional magnetic resonance imaging (fMRI) device works from this principal by using high magnetic fields and radio frequencies to indicate activity. The fMRI helps the medical professional to peer into brain activity, not by measuring brain activity directly, but by observing the flux of oxygen…

medical imaging (Riesz 1995). Since the beginning of the twentieth century, many medical imaging modalities have been used in routine clinical practice to obtain anatomical and physiological information. PET, for instance, is used for physiological imaging. Ultrasound, MRI and CT are commonly used for soft tissue structures (Weissleder and Pittet 2008). In oncology, the integrated examination (PET/CT) has gained widespread acceptance as a tool for diagnosis, staging, prognosis, treatment…

further examines these processes by looking at the influence of voluntary attention on the neural activity of the MT-MST complex, an area of the human visual cortex that is dedicated to the processing of visual motion. The researchers in this experiment hypothesized that; by using and examining functional magnetic resonance imaging they would be able to examine and locate the attentional modulation of neural activity in the human homolog of the MT-MST complex. There was no alternative…

to using incredible technology to diagnose rare illnesses, scientists have come a long way in terms of research and diagnosis. One of the most significant discoveries was made by Nikola Tesla in 1882. Tesla was an inventor, engineer and physicist who found the Rotating Magnetic Field. This brought to light the idea that the opposite poles of a magnetic field rotate around an axis, changing direction at a constant rate with specific angles. Combining Tesla’s discovery with modern technology, the…

Developing a method for imaging inside of human body that compromises generality, accuracy and execution speed has been a great issue for the brain science for the last decades. There are many methods imaging structure such as CT, PET, EEG, MEG, fMRI. Recent years have seen impressive improvements in fMRI, and it seems that fMRI is gaining popularity over other methods. Becoming a popular tool for investigations into the neural correlates of cognitive activity and other research, the number of…

Radiologists are medical doctors that diagnose and treat diseases “using medical imaging technologies.” They use many different tools and machines to diagnose and treat people. Some of the technology used in radiology are catheters, wires, small instruments and tools, scanners, and remote viewing systems. The three most common scans are CT, MRI, and PET. There are many different types of x-rays, the most well known one is the CT scan also known as CAT scan. CT stands for "Computerized…

cells divide and grow uncontrollably. Brain cells begin to grow and divide differently from healthy cells, forming a "high grade" (cancerous) or "low grade" (benign) tumor. Brain tumor spread by local extension and rarely by meta size (spread) outside the brain. The extraction of brain tumors and its analysis are demanding. In recent years, segmentation of brain tumors in magnetic resonance imaging (MRI) has become an emerging area of research in the field of the medical imaging system. Magnetic…