Understanding Radiation Exposure: Risks and Imaging Options Explained
Radiation Dose Issues Hello Doctor: 1. I have undergone X-rays and CT scans within a short period of one month, accumulating a dose of nearly 40 millisieverts. Is this considered too much radiation exposure in a short time, and does it increase my risk of developing cancer? 2...
Dr. Wang Yifen Reply:
Hello, 1. The necessity of X-ray radiation examinations is considered, and there are no restrictions on the radiation dose or the number of examinations. Diagnostic X-rays are classified as low-dose radiation examinations and are generally considered safe according to literatur...[Read More] Understanding Radiation Exposure: Risks and Imaging Options Explained
Understanding Radiation Exposure: Risks and Imaging Options Explained
Radiation Dose Issues Hello Doctor: 1. I have undergone X-rays and CT scans within a month, accumulating a dose of nearly 40 millisieverts. Is this amount of radiation exposure in such a short time concerning, and does it increase my risk of developing cancer? 2. Since I had a...
Dr. Wang Yifen Reply:
Hello, 1. The necessity of X-ray radiation examinations is considered without limiting the radiation dose or the number of examinations. Diagnostic X-rays are classified as low-dose radiation examinations and are generally considered safe according to literature reports. 2. T...[Read More] Understanding Radiation Exposure: Risks and Imaging Options Explained
Understanding Radiation Exposure: Safety Concerns and Accumulation Effects
Radiation issues In April 2024, I underwent 20 X-rays for both shoulders, neck, and spine. In mid-April, another hospital performed 10 X-rays on my neck and shoulders. At the beginning of May, I had a chest X-ray during a health check, and according to the National Health Insuran...
Dr. Wang Yifen Reply:
Hello, the consideration for X-ray radiation examinations is based on the necessity of the examination rather than limiting the radiation dose or the number of tests. X-ray radiation is a form of energy, similar to sunlight, and does not remain in the body after exposure. After a...[Read More] Understanding Radiation Exposure: Safety Concerns and Accumulation Effects
Understanding MRI Report Delays and Diagnostic Accuracy in Prostate Imaging
Issues with MRI reports and diagnostic accuracy? 1. Previously, I underwent a prostate MRI at a hospital and returned for a follow-up appointment on the date scheduled by the physician. However, the report was not available on that day, and the physician scheduled a second follow...
Dr. Wang Yifen Reply:
Hello, there are many reasons why there may not be a written report following imaging examinations, which are related to the administrative processes of the hospital and the availability and training of radiologists. Different imaging modalities have their own advantages and limi...[Read More] Understanding MRI Report Delays and Diagnostic Accuracy in Prostate Imaging
Can You Get an MRI with a Metal Dental Bridge After Cancer Treatment?
Can I have an MRI with a metal dental bridge? Hello Doctor: I was diagnosed with nasopharyngeal cancer last year and have completed radiation and chemotherapy. I need to undergo an MRI of the head and neck every three months. Previously, I had to remove my metal dental bridge due...
Dr. Wang Yifen Reply:
Hello, metals can potentially interfere with MRI imaging, affecting both the safety of the examination and the interpretation of results. Please discuss your concerns with your dentist and the physician treating your nasopharyngeal cancer. It is advisable to follow the recommenda...[Read More] Can You Get an MRI with a Metal Dental Bridge After Cancer Treatment?
Understanding Radiation Exposure from CT Scans and X-rays: Safety Concerns
Computed Tomography Radiation I underwent a head CT scan without contrast on September 23, 2021, a head MRI with contrast on March 16, 2022, and a sinus CT scan without contrast on February 8, 2024. I also had chest X-rays on February 8, 2024, May 27, 2022, August 31, 2022, Febru...
Dr. Zhang Zheng'ang Reply:
Hello: 1. The radiation dose for a sinus CT is approximately 0.7 mSv, and for a head CT, it is about 2.0 mSv. There is no need to consider excessive radiation in relation to medical necessity. 2. Yes. 3. There is no evidence to suggest that it would cause significant harm to the ...[Read More] Understanding Radiation Exposure from CT Scans and X-rays: Safety Concerns
Is MRI Safe for Eyes with Unknown Metal Foreign Bodies?
Magnetic Resonance Imaging (MRI) Hello, doctor. If small metal particles accidentally enter the eye and I undergo an MRI, could the eye be injured?
Dr. Wang Yifen Reply:
Hello, the presence of a metallic foreign body in the orbit is a contraindication for Magnetic Resonance Imaging (MRI), as one cannot enter the high magnetic field environment of an MRI. The high magnetic field may cause the metal to move, resulting in injury. Regarding MRI imagi...[Read More] Is MRI Safe for Eyes with Unknown Metal Foreign Bodies?
Understanding Pregnancy Timing After Contrast MRI: Key Insights
Pregnancy issues Hello Doctor, I had my period from September 11 to 15, underwent an MRI with contrast on September 20, ovulated on September 22, and took a pregnancy test on October 5 which showed two lines. I would like to ask if I conceived before the contrast injection or aft...
Dr. Wang Yifen Reply:
Hello, if the timing you described is correct, under normal physiological mechanisms, conception would occur after ovulation on September 22. Regarding precautions after pregnancy, it is advisable to visit an obstetrician-gynecologist for specialized consultation. Please take thi...[Read More] Understanding Pregnancy Timing After Contrast MRI: Key Insights
Understanding MRI Report Findings: Common Questions Explained
MRI Report Issues Hello, doctor! I have a few questions regarding my MRI report that I would like to clarify. Here is the content of the report, and I would appreciate your assistance in addressing my concerns. Thank you! "Patent intracranial major arteries on MRA. Endplat...
Dr. Wang Yifen Reply:
Hello, the literal meaning of these sentences is as follows: The major blood vessels in the brain are patent on magnetic resonance angiography. There are multiple endplate changes in the lower thoracic vertebrae. The endplate changes in the lower thoracic vertebrae are noted. Ima...[Read More] Understanding MRI Report Findings: Common Questions Explained
Impact of Bluetooth Shoes on MRI Results: Is There a Risk?
Magnetic Resonance Imaging (MRI) Hello, Director. Recently, a family member underwent an MRI of the knee and later realized that they brought their Bluetooth-enabled athletic shoes into the examination room. During the procedure, the shoes were removed and placed on the floor nex...
Dr. Wang Yifen Reply:
Hello, the distance between the shoes placed on the floor and the imaging table should exceed 1 meter to avoid any discrepancies in the examination. If the images are affected by magnetic field interference, any artifacts are usually detectable during the examination. If you stil...[Read More] Impact of Bluetooth Shoes on MRI Results: Is There a Risk?
Understanding Gadolinium Deposition: Risks and Concerns for Patients
Gadolinium-based contrast agent deposition Hello, doctor. Two years ago, I underwent a cervical MRI at another hospital and was administered a contrast agent (I recently called to inquire and found out it was MultiHance). Later, I came across news and literature indicating that g...
Dr. Wang Yifen Reply:
Hello, regarding the potential accumulation of gadolinium-based contrast agents in the brain, the Ministry of Health and Welfare has reassessed their clinical benefits and risks based on Article 48 of the Pharmaceutical Affairs Act. On November 23, 2017, it was announced that aft...[Read More] Understanding Gadolinium Deposition: Risks and Concerns for Patients
Impact of Pre-Pregnancy X-rays and Imaging on Fetal Development
Underwent X-rays, CT scans, and MRI before pregnancy? Hello, Doctor! Before my pregnancy, I underwent 1. X-ray examination (conducted during a company health check on December 31, 2022) 2. Computed tomography (CT scan on January 19, 2023, due to elevated CA-125 levels; ultrasound...
Dr. Wang Yifen Reply:
Hello, the examinations mentioned in the text occurred before pregnancy, and there is no causal relationship between these examinations and fetal development after conception. It is recommended to follow the obstetrician's advice for further monitoring. Please take this into...[Read More] Impact of Pre-Pregnancy X-rays and Imaging on Fetal Development
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 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 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
Understanding MRI Reports: Addressing Concerns About Abdominal Symptoms
MRI report issues Hello, doctor. I started experiencing abdominal discomfort in April of last year and visited various gastroenterology clinics due to persistent symptoms. Eventually, I sought treatment at a large hospital because I was concerned about potential issues with my in...
Dr. Wang Yifen Reply:
Hello, the diagnosis of diseases does not rely solely on imaging examinations; it also requires consideration of clinical symptoms, laboratory tests, family history, personal lifestyle habits, and other relevant information. Even though various imaging studies are non-invasive, t...[Read More] Understanding MRI Reports: Addressing Concerns About Abdominal Symptoms
Understanding Your Heart MRI Results: Key Insights for Patients
Issues with cardiac MRI examination results? Hello, Director: I have been experiencing arrhythmia issues and recently underwent a cardiac MRI (with contrast) examination. I had a similar examination two years ago, which revealed late gadolinium enhancement (LGE) in a certain area...
Dr. Wang Yifen Reply:
Hello, interpreting cardiac MRI images requires reviewing various imaging sequences, dynamic scans, and even comparing them with previous images. I apologize, but based solely on the images you uploaded, it is not appropriate to hastily respond to your inquiries. I have contacted...[Read More] Understanding Your Heart MRI Results: Key Insights for Patients
Understanding MRI and MRCP: Key Differences and Diagnostic Insights
Questions about MRI and MRCP? Does an MRI also include MRCP? If a full-body MRI report shows no issues, can MRCP further detect any lesions? Thank you!
Dr. Wang Yifen Reply:
Hello, MRCP stands for Magnetic Resonance Cholangiopancreatography. It is a non-invasive imaging technique, also known as cholangiopancreatic magnetic resonance imaging. This procedure is part of MRI examinations and utilizes an abdominal radiofrequency coil. Diseases related to ...[Read More] Understanding MRI and MRCP: Key Differences and Diagnostic Insights
CT Scans with BARD PowerPort: Safety and Guidelines for Contrast Injection
Computed Tomography - BARD PowerPort Hello Dr. Wang, I would like to inquire about the use of a BARD PowerPort during a computed tomography (CT) scan when injecting contrast agents. The patient guide provided states that high-pressure injection of contrast agents is permissible w...
Dr. Wang Yifen Reply:
Hello, 1. According to Ms. Wang, a sales representative from BD Company, the POWERPORT implanted injection port can be used in conjunction with the SAFESTEP (safety non-coring needle) for percutaneous access to the port for treatments such as chemotherapy and drug infusion. If ...[Read More] CT Scans with BARD PowerPort: Safety and Guidelines for Contrast Injection
Understanding CT Scans for Abdominal Discomfort: What You Need to Know
Questions about Computed Tomography (CT) Scans? I would like to ask about my discomfort in the upper right abdomen that has persisted for the past couple of months. I have undergone ultrasound, gastroscopy, and colonoscopy, and aside from gastroesophageal reflux and mild gastriti...
Dr. Wang Yifen Reply:
Hello, when arranging advanced imaging health examinations, it is recommended to consider the patient's medical history and the purpose of the examination. For lung cancer screening, the best method currently is low-dose computed tomography (LDCT) of the lungs. For the gastr...[Read More] Understanding CT Scans for Abdominal Discomfort: What You Need to Know