Concerns About Radiation Exposure from Multiple CT Scans After a Fall
Falling from a height and undergoing multiple CT scans raises concerns about radiation exposure? Hello, doctor. I had an accidental fall from a height on August 13, which was life-threatening at the time. I underwent a full-body CT scan and subsequently had various surgeries that...
Dr. Ye Weicheng Reply:
Hello Ms. Lin: Radiation has existed since the formation of the Earth, and both biological evolution and humans have developed a certain level of tolerance to it. Currently, we categorize radiation damage into two types: deterministic effects and stochastic effects. Deterministic...[Read More] Concerns About Radiation Exposure from Multiple CT Scans After a Fall
Understanding Your Mammogram Report: What Mild Regressive Changes Mean
Mammography Hello Dr. Wang, this year I had a mammogram, and the report contains a section that says: "Mammographic lesions: Mild regressive change of the previous irregular equal-density nodule in the lower portion of the left breast, middle third, only seen on the MLO view...
Dr. Wang Yifen Reply:
Hello, the report generated by the physician includes descriptions of the imaging findings, comparisons with previous images, and the physician's final conclusions regarding the classification of the imaging results and recommendations for follow-up. According to the America...[Read More] Understanding Your Mammogram Report: What Mild Regressive Changes Mean
Is It Safe to Have Multiple X-Rays and CT Scans in One Month?
Is it safe to undergo radiation exposure more than three times within a month? I had a chest X-ray in December, a CT scan of the lungs once, and today I had another chest X-ray. Is the radiation dose from these procedures high? Could there be any issues? What effects could this h...
Dr. Wang Yifen Reply:
Hello, the radiation dose from diagnostic X-ray machines is classified as low-dose radiation. A chest X-ray has a radiation dose of approximately 0.02 millisieverts, while a chest CT scan has a radiation dose of about 7 millisieverts. The International Commission on Radiological ...[Read More] Is It Safe to Have Multiple X-Rays and CT Scans in One Month?
Understanding Mild Lung Opacity: Infection vs. Tuberculosis
The tomography is hazy? I have been coughing and losing weight for over a month. On December 19th, my CT scan report indicated a slight haziness on the right side. I would like to know if this is an infection or tuberculosis.
Dr. Wang Yifen Reply:
Hello, the haziness observed in a computed tomography (CT) scan is most likely due to inflammation, infection, or tuberculosis, all of which are forms of inflammation. Additional tests are necessary, such as laboratory blood tests, sputum analysis, or other supportive evaluations...[Read More] Understanding Mild Lung Opacity: Infection vs. Tuberculosis
Does Dental X-Ray Radiation Cause Hair Follicle Damage?
X-ray radiation issues? I had a panoramic X-ray and a lateral cephalometric X-ray a few days ago. Will this cause damage to the hair follicles, leading to eyelash or hair loss?
Dr. Wang Yifen Reply:
Hello, according to the reference materials from the American Society of Radiologic Technologists, the radiation dose from a single full-mouth X-ray for adults is approximately 0.01 millisieverts, while the radiation dose from an adult cranial X-ray is about 0.1 millisieverts. Th...[Read More] Does Dental X-Ray Radiation Cause Hair Follicle Damage?
Understanding Contrast Agents in CT Scans: When Are They Necessary?
Regarding contrast agents? Hello, doctor. I went to see a neurologist due to headaches, and they arranged a CT scan for me without the use of contrast dye. I would like to ask: 1. Since I have previously had a CT scan with contrast dye, I am concerned that not using contrast this...
Dr. Wang Yifen Reply:
Hello, regardless of whether the patient receives contrast agent for the computed tomography (CT) scan, the same CT equipment is used for the examination. Therefore, the decision to administer contrast is not influenced by the equipment. The assessment of whether to use contrast ...[Read More] Understanding Contrast Agents in CT Scans: When Are They Necessary?
Understanding X-Ray Risks for Infants: What Parents Should Know
X-ray exposure in infants and young children? A 9-month-old child was taken to the emergency department due to vomiting and crying, where a chest and abdominal X-ray was performed. During a follow-up with a pediatrician, the doctor mentioned that such a young child should not hav...
Dr. Wang Yifen Reply:
Hello, the radiation dose from an abdominal X-ray for adults is approximately 0.7 millisieverts. Since children's body sizes are smaller than adults, the radiation dose they receive is lower than the average dose for adults. The radiation dose from a single abdominal X-ray i...[Read More] Understanding X-Ray Risks for Infants: What Parents Should Know
Understanding Radiation Exposure from Multiple CT Scans: What You Need to Know
Radiation Dose from Computed Tomography (CT) Scans Hello Doctor, I am 28 years old. Due to my poor health over the past few years, I have undergone several abdominal CT scans this year, all of which were arranged by my doctor. However, I am very scared about the risk of radiation...
Dr. Wang Yifen Reply:
According to information from the National Health Service, both men and women have approximately a 40% risk of being diagnosed with cancer at some point in their lives. The vast majority of cases are caused by aging and long-term exposure to risk factors such as tobacco, alcohol,...[Read More] Understanding Radiation Exposure from Multiple CT Scans: What You Need to Know
Understanding CT Scan Radiation: Safety and Accumulation Concerns
Computed Tomography (CT) radiation? Hello, doctor. 1. I would like to ask if the radiation exposure from a CT scan accumulates in the body. I am scheduled for a head CT scan soon (which requires contrast media). 2. I had an abdominal CT scan last October (also with contrast m...
Dr. Wang Yifen Reply:
Hello, radiation is a form of energy that causes exposure during examinations, but it does not accumulate in the human body afterward. It is similar to how sunlight does not accumulate in the body after sun exposure. It is important to be aware of the effects of radiation on the ...[Read More] Understanding CT Scan Radiation: Safety and Accumulation Concerns
Understanding CT Scan Radiation: Safety Concerns and Accumulation Explained
Computed Tomography (CT) Radiation Hello, doctor. 1. I would like to ask if the radiation exposure from a CT scan accumulates in the body. I am scheduled for a head CT scan soon (which requires contrast dye). 2. I had an abdominal CT scan last October (also with contrast dye)...
Dr. Wang Yifen Reply:
Hello, radiation is a form of energy that results in exposure during examinations, but it does not accumulate in the human body after the procedure. This is similar to how sunlight does not accumulate in the body after sun exposure. It is important to be aware of the effects of r...[Read More] Understanding CT Scan Radiation: Safety Concerns and Accumulation Explained
CT vs MRI: Which is Better for Small Intestine Evaluation?
Computed Tomography (CT) scan Hello, Director Wang. Due to a long-term (one year) recurring diarrhea issue, I would like to pay for an examination (I have already undergone gastroscopy, colonoscopy, and an upper abdominal MRI). I would like to ask the doctor whether I should choo...
Dr. Wang Yifen Reply:
Hello, imaging studies of the small intestine can include small bowel X-rays or computed tomography (CT) scans. Magnetic resonance imaging (MRI) does not involve radiation but has a longer examination time and is significantly affected by small bowel peristalsis, making it less s...[Read More] CT vs MRI: Which is Better for Small Intestine Evaluation?
Understanding CT Scan Radiation: Safety Concerns and Accumulation Risks
Computed Tomography (CT) Radiation Hello, doctor. 1. I would like to ask if the radiation exposure from a computed tomography (CT) scan accumulates in the body. I am scheduled to undergo a head CT scan soon (which requires contrast agent). 2. I had an abdominal CT scan last O...
Dr. Wang Yifen Reply:
Hello, radiation is a form of energy that results in exposure during examinations, but it does not accumulate in the human body after the procedure. It is similar to how sunlight does not accumulate in the body after sun exposure. It is important to be aware of the effects of rad...[Read More] Understanding CT Scan Radiation: Safety Concerns and Accumulation Risks
Understanding Radiation in Water-Soluble Contrast Agents and Barium
Water-soluble contrast agents or barium agents? Hello, I recently need to undergo an upper gastrointestinal barium study due to personal health reasons. I searched for information online, but I couldn't find out whether the water-soluble contrast agents and barium excreted f...
Dr. Wang Yifen Reply:
Hello: In upper gastrointestinal imaging, the radiation comes from the X-ray machine used for the examination. Radiation is present only when the medical personnel operate the machine to generate X-ray energy for imaging. The contrast agents used in the examination, whether water...[Read More] Understanding Radiation in Water-Soluble Contrast Agents and Barium
Understanding Changes in Lung Nodules: CT Scan Report Inquiry
Inquiry about CT report? On June 20, I had a chest CT that revealed a 5mm solid nodule at the right middle lobe (RML) (SE3 IM196). Subsequently, on September 29, I had a follow-up at the same hospital, and the results were as follows: Airway/lungs/pleura: two 5mm solid nodules at...
Dr. Wang Yifen Reply:
1. The patient lies on the examination table, and the scanning position of the equipment may vary relative to the patient's position on the table; it is not fixed for every examination. The marked location indicates the relative position of the images generated by the scan d...[Read More] Understanding Changes in Lung Nodules: CT Scan Report Inquiry
Understanding MRI's Role in Detecting Colorectal Cancer Stages
Colorectal cancer MRI Doctor, I had a full-body MRI last year, and recently I've been having gastrointestinal issues, feeling the urge to use the restroom frequently. I have a family history of colorectal cancer, and I'm really worried it might be colorectal cancer. 1...
Dr. Wang Yifen Reply:
Hello, regarding colorectal cancer screening, the National Health Administration provides free fecal occult blood tests every two years for individuals aged 50 and older. If the fecal occult blood test is positive, the next diagnostic tool is a colonoscopy. Abdominal computed tom...[Read More] Understanding MRI's Role in Detecting Colorectal Cancer Stages
Understanding White Spots on Mammograms: Should You Worry About Breast Cancer?
Breast white spots Doctor, my wife previously had a mammogram at the hospital, and they informed us that there are white spots that require further magnification imaging. I would like to know if this increases the likelihood of breast cancer.
Dr. Wang Yifen Reply:
Hello, the white spots seen in mammography may be calcifications. Most breast calcifications are benign, but they can also be indicative of breast cancer, so further magnification and evaluation are necessary. For more information regarding breast calcifications, you can refer to...[Read More] Understanding White Spots on Mammograms: Should You Worry About Breast Cancer?
Understanding CT Scan Results: Hemangioma vs. Focal Nodular Hyperplasia
Computed Tomography (CT) Scan 1. The statement starting with "although" indicates that the differentiation between hemangioma and focal nodular hyperplasia is challenging due to the limitations of the CT scan performed, which was not conducted according to the dynamic l...
Dr. Wang Yifen Reply:
Hello: 1. I believe the meaning of this English report is that the imaging after the administration of contrast agent is more likely indicative of a hepatic hemangioma or focal nodular hyperplasia. However, further differentiation is challenging because the CT scan was not perf...[Read More] Understanding CT Scan Results: Hemangioma vs. Focal Nodular Hyperplasia
Understanding Potential Metastasis in Testicular Cancer: CT Scan Insights
Suspected metastasis of testicular cancer? Hello: I have testicular cancer and recently suspected a recurrence, so I underwent a whole-body CT scan. Here are the report details from my health record: Chest CT: Multiple tiny peribronchial nodules and mild subsegmental atelectasis ...
Dr. Wang Yifen Reply:
Hello, 1. The health insurance report is uploaded by the hospital to a dedicated website for the National Health Insurance Administration, providing reference for the public. To my understanding, hospitals can only upload the report once. If a physician later reviews the images...[Read More] Understanding Potential Metastasis in Testicular Cancer: CT Scan Insights
Is Frequent X-Ray Exposure for Kidney Stones Safe? Understanding Risks and Recommendations
X-ray of the lumbar region for kidney stones? Hello, I have been experiencing kidney stone pain since mid-May. I had an X-ray on May 11, and when I went to the lithotripsy center on May 16, they said they would take another X-ray to confirm the location, which was done on the lit...
Dr. Wang Yifen Reply:
According to the American Society of Radiologic Technologists, the radiation dose from a single abdominal X-ray is approximately 0.7 millisieverts. The International Commission on Radiological Protection (ICRP) report 103 states that doses below 100 millisieverts (including singl...[Read More] Is Frequent X-Ray Exposure for Kidney Stones Safe? Understanding Risks and Recommendations
Can Cardiac CT and Low-Dose Lung CT Be Done Together?
Cardiac CT with low dose? I have high cholesterol and experience palpitations after exercise. I am planning to undergo a cardiac CT scan. However, I previously had a low-dose lung CT that revealed three pulmonary nodules measuring 0.3, 0.5, and 0.6 cm, which need to be monitored ...
Dr. Wang Yifen Reply:
Hello, both of these examinations are performed using computed tomography (CT) scanners, but they serve different purposes, and the scanning range and parameters are also different. Cardiac CT is used to assess whether there is stenosis in the coronary arteries and requires the i...[Read More] Can Cardiac CT and Low-Dose Lung CT Be Done Together?
Radiology FAQ
| Contrast Agent | Ct Scan |
| Ct Scan Radiation | Magnetic Resonance Imaging |
| Mri | Mri Report |
| Radiation | Radiological Examination |
| X-Ray | X-Ray Examination |
| X-Ray Radiation |