The centre is equipped with the latest 3.0T MRI with Multi Transmit Technology from Philips. All MRI examinations including ultrafast sub-second scans are routinely performed at the centre. MRI is a non invasive study using nuclear magnetic resonance to render images of the inside of the body to demonstrate pathological or other physiological alterations of the living tissues.
MR imaging is based on the relaxation properties of excited hydrogen nuclei in water and lipids when the object to be imaged in are placed in powerful magnetic field in form of a large cylindrical magnet. The spins of atomic nuclei arrange in a particular manner parallel or anti-parallel to the applied magnetic field. After this orthogonal magnetic gradients are applied in X,Y & Z axis to selectively image different volume picture elements of the subject. This data is created in a 2D or 3D matrix and images are created from this matrix.
MR imaging uses a powerful magnet, radiofrequency waves and a computer to generate pictures of organs, soft tissues, one and other internal body structures in detail. No harmful ionizing radiation is used in MR imaging.
What is Multi Transmit MRI ?
The usual applications of MRI are in diagnosing / visualizing :
Our MRI machine unlike other MRI machines produces images comparable to PET Scan without the radiation.
Diffusion Weighted Imaging with Background Suppression (DWIBS) is able to distinguish a tumor in normal looking tissue. This is because unlike other MRI sequences, DWIBS shows the relatively dense molecular structure of the rapidly dividing tumor. This sequence was designed to achieve images similar to a PET scan. Research has shown DWIBS achieves a diagnostic confidence comparable to that of a PET scan. A facility with this unique capability plays an important role when choosing an imaging centre that’s right for you.
Until recently, most MRI machines were unable to perform a full body examination. They could only perform individual parts where the study had to be stopped and the patient repositioned in a piecemeal fashion. Our machine is one of a few machines in the country that allows full body MRI imaging from head to toe.
We perform a thorough study of the brain and entire spine, with a complete systematic review of all of the abdominal and pelvic organs. We believe in the central role of comprehensive risk factor assessment and screening technologies in the early detection of disease. After your scan, our radiologists will review the examination with you and provide you with a copy of the study results.
Diffusion weighted images are very commonly used in the assessment of acute stroke and are used in oncology. Diffusion Tensor Imaging , also known as MR Tractography non-invasively maps white matter tracts.
MR Angiography (MRA)
MR angiography is used to generate images of the arteries to detect any abnormal narrowing / dilatation or abnormal arterio-venous connections. MR angiography is often used to evaluate the arteries of the neck and brain, the thoracic and renal arteries and the arteries of legs. Magnetic Resonance Venography (MRV) procedure is used to image veins.
MR spectroscopy is a noninvasive method and provides metabolic information about the brain. MR spectroscopy enables tissue characterization on a biochemical level surpassing that of conventional MR imaging. MR spectroscopy also detects abnormalities that are invisible to conventional MRI because metabolic abnormalities often precede structural changes.
Although X-Ray Mammography remains the primary imaging modality in the evaluation of breast disease, the mammograms at times are inconclusive for the presence or location of an abnormality. MR imaging is used as an adjunct to mammography, particularly for patients with equivocal mammographic findings. MR mammography is useful to verify multifocality and multicentricity of breast cancer, differentiate scars from recurrences after breast-conserving therapy, screen high-risk groups who have a family history of breast cancer, investigate breast implants, examine breasts in cases of histologically proven breast cancer and metastasis with unknown primary.
MR defecography is a technique to study disorders of ano-rectal function. It is indicated in patients having constipation, rectal incontinence, painful defecation and rectal prolapse. It permits analysis of the ano-rectal angle, opening of the anal canal, function of the puborectalis muscle and descent of pelvic floor during defecation. It provides good demonstration of the rectal wall, intussusception, enteroceles and rectoceles with excellent demonstration of the perirectal soft tissue. It allows assessment of spastic pelvic floor syndrome and descending perineum syndrome.
ANSWERING YOUR QUESTIONS ABOUT MRI
What exactly is MRI?
MRI stands for Magnetic Resonance Imaging. Without using traditional X-ray imaging, MRI allows doctors to see inside the body to diagnose and identify possible medical conditions. An MRI simply samples signals from the water that makes up your body. Specialized antennae create highly defined images that can be used to make diagnosis. You wll discover that MRI testing is painless and much quicker than you think. In fact, you will probably be very comfortable as you lie on the padded table. The accuracy and speed of the latest MRI scanners means that you will be done quickly and your doctor will have to run fewer—if any—follow-up scans. But keep in mind that an MRI is not for everyone. So be sure to inform your physician if you have: a pacemaker, aneurysm clips in the brain, a shunt with telesensor, inner ear implants, metal fragments in one or both eyes, implanted spinal cord stimulators, or if you’re pregnant or breast feeding. Many of your questions about MRI are answered here. But should you have any other questions or concerns, please consult your doctor.
MRI at Dr. Dodas – what is so special ?
Dr. Dodas diagnostics and healthcare is powered with unique Patient-adaptive 3.0T MRI with MultiTransmit te c h n o l o g y. T h i s te c h n o l o g y d e l i ve r s mo s t homogenous images for accurate interpretation, in contrast to conventional 3.0T MRIs where dielectric shading is a major concern The ultra-high-field Achieva 3.0T TX system delivers faster scans with higher-resolution which enables precise diagnosis. It is wider opening and low noise features with dedicated coil designs for each body part makes it ideal for patient comfort and a positive MRI experience.
WHY ARE MRI SCANS IMPORTANT?
MRI scans allow doctors to see images of your internal organs and structures in great detail from many angles. This gives them information more quickly, and in many cases more economically, than past tests and exploratory surgeries.
IS AN MRI SCAN LIKE AN X-RAY?
No, an MRI scan uses a powerful magnet in conjunction with radio frequency waves to generate images of your internal organs and structures. It is one of the least invasive tests that can see inside the body.
HOW LONG WILL THE EXAM TAKE?
That will depend on what is being studied, but a typical exam lasts between 8 to 20 minutes. You should allow extra time in case the exam lasts longer than expected.
DOES THE MACHINE MAKE A LOT OF NOISE?
The magnet makes a slight rapping sound as images are being taken. In between scans the machine is quiet. The MRI technologist will provide you with hearing protection, but its use will not prevent you from hearing the technologist if he or she speaks to you during the exam.
DO I HAVE TO HOLD STILL THE WHOLE TIME?
It is important for image clarity and the best scan results to hold still during the exam. The technologists will inform you when you may move between scans. Keep in mind a routine exam can take at least 8 minutes.
WILL I BE ALONE?
You will be in contact with a technologist at all times. Even when he or she is not in the MRI room, you will be able to talk to him or her by intercom. In some cases a family member is welcome to stay in the room with you during your scan.
Magnetic Resonance Imaging is one of the most useful tools physicians have to make an accurate diagnosis and select an appropriate treatment for their patients. Because these images are computer generated, they can be instantly sent electronically to off-site specialists and consultants. Thanks to advanced design features, your MRI should prove perfectly comfortable. In fact, you find it more relaxing.
INSTRUCTIONS FOR PATIENTS
We recommend you take prior appointment for MRI to avoid waiting time at the centre.
Though in most of the examinations no contrast is used. But some will require administration of contrast. This is generally so when we suspect infective/inflammatory pathology or mass lesion. Some times it is also administered for vascular studies and other special applications. Reports for kidney function such as blood urea, serum creatinine or any other investigation that may have been done for kidneys should be brought at the time of examination. Any history of allergy to drugs, diabetes and drugs that are being taken for treatment should be available.