সংজ্ঞা
Computed tomography angiography (CTA) is a specialized x-ray that examines blood flow in blood vessels when they are filled with a contrast material. Contrast material is a substance that makes the blood vessels show on an x-ray. Computed tomography (CT) uses a complex machine to take x-rays from many different views, producing detailed two-dimensional images that can be combined by a computer to form three-dimensional images.
CTA can be used to view blood vessels throughout the body. It is most commonly used to study the:
- Brain
- Heart
- Lungs
- Kidneys
- Legs or arms
পরীক্ষার কারণ
This test is used to help doctors identify diseased, narrowed, enlarged, and blocked blood vessels and locate where internal bleeding may be occurring. Some specific uses include:
- Detecting atherosclerosis, a narrowing of the arteries
- Detecting an aneurysm, a ballooning out of a section of a blood vessel
- Examining arteries in the lungs to check for blockage of a blood vessel
- Evaluating disease in kidney arteries
সম্ভাব্য জটিলতা
পদ্ধতি থেকে সমস্যা বিরল, কিন্তু সমস্ত পদ্ধতির কিছু ঝুঁকি আছে। আপনার ডাক্তার সম্ভাব্য সমস্যা পর্যালোচনা করবেন, যেমন:
- Allergic reactions to contrast material
- Excess bleeding
- কিডনির ক্ষতি
কি আশা করা যায়
পরীক্ষার আগে
Prior to the surgery, the doctor will do a physical exam.
Talk to your doctor about any medications, herbs, or supplements you are taking. You may have to stop certain medications, food, or beverages before the test.
At the care center:
- আপনি আপনার জামাকাপড় খুলে একটি গাউন বা পোশাক পরবেন।
- আপনি সমস্ত গয়না, চুলের ক্লিপ, দাঁতের টুকরো এবং অন্যান্য বস্তুগুলি সরিয়ে ফেলবেন যা এক্স-রেতে দেখাতে পারে এবং ছবিগুলি পড়তে অসুবিধা হতে পারে।
পরীক্ষার বর্ণনা
An intravenous line (IV) is placed in a vein, and you will lie down on a narrow table. Pillows and straps may be used to keep you in a certain position. The part of your body that will be studied is moved inside the opening of the CT machine, and a test image is taken. You will be given a small amount of contrast material through the IV to check how long it takes to get to the area to be studied. Next, the IV is connected to an automatic injector and contrast material is injected. Then, the scan begins.
You must stay still during the scan. The technologist may ask you to hold your breath for 10-25 seconds to ensure that the images are not blurred by any movement. It only takes seconds to record all the images needed.
পরীক্ষার পর
The images are checked. If needed, some are repeated.
After the procedure, be sure to follow your doctor’s instructions. During the hours after the procedure, drink extra fluids to help flush the contrast material from your body.
কতক্ষণ এটা লাগবে?
20-60 minutes however, most of the time is spent setting things up.
এটা আঘাত করবে?
Although the procedure is not painful, you may feel warm and flushed when contrast material is injected.
ফলাফল
The radiologist will look at the images and report the findings to your doctor, usually within 24 hours. Your doctor will discuss the findings with you and any treatment needed.
আপনার ডাক্তারকে কল করুন
পরীক্ষার পরে, যদি নিম্নলিখিতগুলির মধ্যে কোনটি ঘটে তবে আপনার ডাক্তারকে কল করুন:
- Signs of allergic reaction, including flushing, hives, and itching
- Swollen or itchy eyes
- Difficulty breathing or a feeling of tightness in your throat
- বমি বমি ভাব
আপনি যদি মনে করেন আপনার জরুরী অবস্থা আছে, তাহলে অবিলম্বে চিকিৎসা সহায়তার জন্য কল করুন।