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Advances in radiology have radically transformed medical practice, with CT scans and nuclear medicine exams providing physicians with the ability to quickly pinpoint internal bleeding, diagnose kidney stones or confirm appendicitis, assess thyroid function and identify and open blockages in the blood vessels to the heart.
The downside is that Americans are being exposed to record amounts of ionizing radiation, the most energetic and potentially hazardous form of radiation.
According to a new study, the per-capita dose of ionizing radiation from clinical imaging exams in the United States increased almost 600 percent from 1980 to 2006. In the past, natural background radiation was the leading source of human exposure; that has been displaced by diagnostic imaging procedures, the authors said.
“This is an absolutely sentinel event, a wake-up call,” said Dr. Fred A. Mettler Jr., principal investigator for the study, by the National Council on Radiation Protection. “Medical exposure now dwarfs that of all other sources.”
The study, financed by the federal government, is to be published by early next year. It found a particularly sharp rise in the number of CT scans — to 62 million in 2006, from 3 million in 1980. Though CTs make up only 12 percent of all medical radiation procedures, they deliver almost half of the estimated collective dose of radiation exposure in the United States. A CT scan exposes patients to far more radiation than a standard X-ray, and multislice CT scanners deliver higher doses of radiation than single-slice scanners.
Nuclear medicine exams increased to 18.1 million in 2006, from 6.4 million in 1980. They represent almost a quarter of the estimated collective radiation dose, with cardiac studies making up most of the dose.
X-rays have been classified as carcinogens by the World Health Organization, the Centers for Disease Control and Prevention and the National Institute of Environmental Health Sciences, because studies have shown that exposure causes leukemia and cancers of the thyroid, breast and lung.
Yet with the exception of mammography, scans remain largely unregulated.Radiation doses for the same procedure can vary drastically, as different machines in the hands of different practitioners deliver doses that vary by as much as a factor of 10, experts say.
Radiologists say they do not want to scare people away from having scans and exams when necessary, but they want patients — as well as physicians — to carefully evaluate the benefits and risks of each scan or exam, make sure the procedure is appropriate and keep track of cumulative exposure levels. Full-body CT scans should be avoided unless there is a good medical reason.
“We’re not saying you shouldn’t have X-rays or CT scans — they’re wonderful, they’ve totally revolutionized the practice of medicine,” said Dr. E. Stephen Amis Jr., a former president of the American College of Radiology who is chairman of radiology at Albert Einstein College of Medicine and Montefiore Medical Center in New York. “But if you go into the emergency room with recurrent pain and get a CT scan every time you show up, that’s not good. Use a little common sense.”
Studies of atomic bomb survivors in Japan found a statistically significant increase in cancer at high levels of exposure — 50 millisieverts, or mSv, about 16 times the current annual average for Americans from medical exams. But that figure is controversial; it is not clear that lower levels of radiation exposure are safe. Nor would it be unusual for a patient to exceed this level, according to a recent paper from the American College of Radiology.
“It is worth noting that many CT scans and nuclear medicine studies have effective dose estimates in the range of 10 to 25 mSv for a single study, and some patients have multiple studies; thus it would not be uncommon for a patient’s estimated exposure to exceed 50 mSv,” the paper said, adding that “the International Commission on Radiological Protections has reported that CT doses can indeed approach or exceed levels that have been shown to result in an increase in cancer.”There are several steps patients can take to protect themselves, and they should not be shy about asking questions, doctors and other experts say.
“They can always inquire of the referring physician, ‘Is this test necessary?’ ” said Richard Morin, chairman of the radiology college’s quality and safety committee, adding that “exams are often done for reasons that are not quite appropriate.”
Doctors should be familiar with the radiology college index of appropriateness criteria, which rates the imaging procedures for some 200 medical conditions. Dr. Morin suggests asking the doctor ordering the test about its rating for a given condition.
Scores range from 1 to 9, he said, and “if the number turns out to be 1 or 2, you should look for some other exam.”
When undergoing a scan or exam, patients should try to use a facility accredited by the American College of Radiology. The accreditation, which is voluntary, means the machines are surveyed and calibrated to use the correct level of radiation and the technologists are certified. It also means the images are likely to be of higher quality, reducing the likelihood of having to repeat a procedure and suffer additional exposure.
Research studies closely regulate and monitor radiation doses, so participating in a research study may provide some protection, Dr. Morin said. Hospitalized patients are also often scanned routinely once a day when they are very ill, he said, and “it’s not unreasonable for someone to ask, ‘Do I really need this exam every day?’ ” Patients may also want to ask the radiologists or technicians whether the machines are routinely inspected by a medical physicist.
Women should tell the doctor or technician if they might be pregnant; generally, women, children and young people should try to avoid scans.
If patients are given a CD of their scan, along with the interpretation, they should hold onto it, to avoid having to repeat a procedure. People who are undergoing multiple studies may want to keep a record tracking all the radiological procedures they have had, and inform their physicians of their history, said Dr. Amis, of Albert Einstein.
“Patients should have a questioning demeanor when going in for any kind of health care,” he said. “Unfortunately, the majority do not.”

Advances in radiology have radically transformed medical practice, with CT scans and nuclear medicine exams providing physicians with the ability to quickly pinpoint internal bleeding, diagnose kidney stones or confirm appendicitis, assess thyroid function and identify and open blockages in the blood vessels to the heart.
The downside is that Americans are being exposed to record amounts of ionizing radiation, the most energetic and potentially hazardous form of radiation.
According to a new study, the per-capita dose of ionizing radiation from clinical imaging exams in the United States increased almost 600 percent from 1980 to 2006. In the past, natural background radiation was the leading source of human exposure; that has been displaced by diagnostic imaging procedures, the authors said.
“This is an absolutely sentinel event, a wake-up call,” said Dr. Fred A. Mettler Jr., principal investigator for the study, by the National Council on Radiation Protection. “Medical exposure now dwarfs that of all other sources.”
The study, financed by the federal government, is to be published by early next year. It found a particularly sharp rise in the number of CT scans — to 62 million in 2006, from 3 million in 1980. Though CTs make up only 12 percent of all medical radiation procedures, they deliver almost half of the estimated collective dose of radiation exposure in the United States. A CT scan exposes patients to far more radiation than a standard X-ray, and multislice CT scanners deliver higher doses of radiation than single-slice scanners.
Nuclear medicine exams increased to 18.1 million in 2006, from 6.4 million in 1980. They represent almost a quarter of the estimated collective radiation dose, with cardiac studies making up most of the dose.
X-rays have been classified as carcinogens by the World Health Organization, the Centers for Disease Control and Prevention and the National Institute of Environmental Health Sciences, because studies have shown that exposure causes leukemia and cancers of the thyroid, breast and lung.
Yet with the exception of mammography, scans remain largely unregulated.Radiation doses for the same procedure can vary drastically, as different machines in the hands of different practitioners deliver doses that vary by as much as a factor of 10, experts say.
Radiologists say they do not want to scare people away from having scans and exams when necessary, but they want patients — as well as physicians — to carefully evaluate the benefits and risks of each scan or exam, make sure the procedure is appropriate and keep track of cumulative exposure levels. Full-body CT scans should be avoided unless there is a good medical reason.
“We’re not saying you shouldn’t have X-rays or CT scans — they’re wonderful, they’ve totally revolutionized the practice of medicine,” said Dr. E. Stephen Amis Jr., a former president of the American College of Radiology who is chairman of radiology at Albert Einstein College of Medicine and Montefiore Medical Center in New York. “But if you go into the emergency room with recurrent pain and get a CT scan every time you show up, that’s not good. Use a little common sense.”
Studies of atomic bomb survivors in Japan found a statistically significant increase in cancer at high levels of exposure — 50 millisieverts, or mSv, about 16 times the current annual average for Americans from medical exams. But that figure is controversial; it is not clear that lower levels of radiation exposure are safe. Nor would it be unusual for a patient to exceed this level, according to a recent paper from the American College of Radiology.
“It is worth noting that many CT scans and nuclear medicine studies have effective dose estimates in the range of 10 to 25 mSv for a single study, and some patients have multiple studies; thus it would not be uncommon for a patient’s estimated exposure to exceed 50 mSv,” the paper said, adding that “the International Commission on Radiological Protections has reported that CT doses can indeed approach or exceed levels that have been shown to result in an increase in cancer.”There are several steps patients can take to protect themselves, and they should not be shy about asking questions, doctors and other experts say.
“They can always inquire of the referring physician, ‘Is this test necessary?’ ” said Richard Morin, chairman of the radiology college’s quality and safety committee, adding that “exams are often done for reasons that are not quite appropriate.”
Doctors should be familiar with the radiology college index of appropriateness criteria, which rates the imaging procedures for some 200 medical conditions. Dr. Morin suggests asking the doctor ordering the test about its rating for a given condition.
Scores range from 1 to 9, he said, and “if the number turns out to be 1 or 2, you should look for some other exam.”
When undergoing a scan or exam, patients should try to use a facility accredited by the American College of Radiology. The accreditation, which is voluntary, means the machines are surveyed and calibrated to use the correct level of radiation and the technologists are certified. It also means the images are likely to be of higher quality, reducing the likelihood of having to repeat a procedure and suffer additional exposure.
Research studies closely regulate and monitor radiation doses, so participating in a research study may provide some protection, Dr. Morin said. Hospitalized patients are also often scanned routinely once a day when they are very ill, he said, and “it’s not unreasonable for someone to ask, ‘Do I really need this exam every day?’ ” Patients may also want to ask the radiologists or technicians whether the machines are routinely inspected by a medical physicist.
Women should tell the doctor or technician if they might be pregnant; generally, women, children and young people should try to avoid scans.
If patients are given a CD of their scan, along with the interpretation, they should hold onto it, to avoid having to repeat a procedure. People who are undergoing multiple studies may want to keep a record tracking all the radiological procedures they have had, and inform their physicians of their history, said Dr. Amis, of Albert Einstein.
“Patients should have a questioning demeanor when going in for any kind of health care,” he said. “Unfortunately, the majority do not.”

Heart disease is a number of abnormal conditions affecting the heart and the blood vessels in the heart. Types of heart disease include:
Coronary artery disease (CAD) is the most common type and is the leading cause of heart attacks. When you have CAD, your arteries become hard and narrow. Blood has a hard time getting to the heart, so the heart does not get all the blood it needs. CAD can lead to:
Angina. Angina is chest pain or discomfort that happens when the heart does not get enough blood. It may feel like a pressing or squeezing pain, often in the chest, but sometimes the pain is in the shoulders, arms, neck, jaw, or back. It can also feel like indigestion (upset stomach). Angina is not a heart attack, but having angina means you are more likely to have a heart attack.
Heart attack. A heart attack occurs when an artery is severely or completely blocked, and the heart does not get the blood it needs for more than 20 minutes.
Heart failure occurs when the heart is not able to pump blood through the body as well as it should. This means that other organs, which normally get blood from the heart, do not get enough blood. It does NOT mean that the heart stops. 
Extreme tiredness:
Heart arrhythmias are changes in the beat of the heart. Most people have felt dizzy, faint, out of breath or had chest pains at one time. These changes in heartbeat are, for most people, harmless. As you get older, you are more likely to have arrhythmias. Don’t panic if you have a few flutters or if your heart races once in a while.
Do women need to worry about heart disease?
Yes. One in three American women dies of heart disease. In 2003, almost twice as many women died of cardiovascular disease (both heart disease and stroke) than from all cancers combined. The older a woman gets, the more likely she is to get heart disease. But women of all ages should be concerned about heart disease. All women should take steps to prevent heart disease.
Both men and women have heart attacks, but more women who have heart attacks die from them. Treatments can limit heart damage but they must be given as soon as possible after a heart attack starts. Ideally, treatment should start within one hour of the first symptoms.
Do women of color need to worry about heart disease?
Yes. African American and Hispanic American/Latina women are more likely to get heart disease because they tend to have more risk factors such as obesity, lack of exercise, high blood pressure, and diabetes than white women. Women of color also are more likely than white women to die of heart disease. If you’re a woman of color, take steps to reduce your risk factors.
What can I do to prevent heart disease?
You can reduce your chances of getting heart disease by taking these steps:
Know your blood pressure. Your heart moves blood through your body. If it is hard for your heart to do this, your heart works harder, and your blood pressure will rise. People with high blood pressure often have no symptoms, so have your blood pressure checked every 1 to 2 years. If you have high blood pressure , your doctor may suggest you make some lifestyle changes, such as eating less salt and exercising more. Your doctor may also prescribe medicine to help lower your blood pressure.
What does high cholesterol have to do with heart disease?
Cholesterol is a waxy substance found in all parts of the body. When there is too much cholesterol in your blood, cholesterol can build up on the walls of your arteries and cause blood clots. Cholesterol can clog your arteries and keep your heart from getting the blood it needs. This can cause a heart attack.
There are two types of cholesterol:
Low-density lipoprotein (LDL) is often called the “bad” type of cholesterol because it can clog the arteries that carry blood to your heart. For LDL, lower numbers are better.
High-density lipoprotein (HDL) is known as “good” cholesterol because it takes the bad cholesterol out of your blood and keeps it from building up in your arteries. For HDL, higher numbers are better.
All women age 20 and older should have their blood cholesterol and triglyceride levels checked at least once every 5 years.

Heart disease is a number of abnormal conditions affecting the heart and the blood vessels in the heart. Types of heart disease include:
Coronary artery disease (CAD) is the most common type and is the leading cause of heart attacks. When you have CAD, your arteries become hard and narrow. Blood has a hard time getting to the heart, so the heart does not get all the blood it needs. CAD can lead to:
Angina. Angina is chest pain or discomfort that happens when the heart does not get enough blood. It may feel like a pressing or squeezing pain, often in the chest, but sometimes the pain is in the shoulders, arms, neck, jaw, or back. It can also feel like indigestion (upset stomach). Angina is not a heart attack, but having angina means you are more likely to have a heart attack.
Heart attack. A heart attack occurs when an artery is severely or completely blocked, and the heart does not get the blood it needs for more than 20 minutes.
Heart failure occurs when the heart is not able to pump blood through the body as well as it should. This means that other organs, which normally get blood from the heart, do not get enough blood. It does NOT mean that the heart stops. 
Extreme tiredness:
Heart arrhythmias are changes in the beat of the heart. Most people have felt dizzy, faint, out of breath or had chest pains at one time. These changes in heartbeat are, for most people, harmless. As you get older, you are more likely to have arrhythmias. Don’t panic if you have a few flutters or if your heart races once in a while.
Do women need to worry about heart disease?
Yes. One in three American women dies of heart disease. In 2003, almost twice as many women died of cardiovascular disease (both heart disease and stroke) than from all cancers combined. The older a woman gets, the more likely she is to get heart disease. But women of all ages should be concerned about heart disease. All women should take steps to prevent heart disease.
Both men and women have heart attacks, but more women who have heart attacks die from them. Treatments can limit heart damage but they must be given as soon as possible after a heart attack starts. Ideally, treatment should start within one hour of the first symptoms.
Do women of color need to worry about heart disease?
Yes. African American and Hispanic American/Latina women are more likely to get heart disease because they tend to have more risk factors such as obesity, lack of exercise, high blood pressure, and diabetes than white women. Women of color also are more likely than white women to die of heart disease. If you’re a woman of color, take steps to reduce your risk factors.
What can I do to prevent heart disease?
You can reduce your chances of getting heart disease by taking these steps:
Know your blood pressure. Your heart moves blood through your body. If it is hard for your heart to do this, your heart works harder, and your blood pressure will rise. People with high blood pressure often have no symptoms, so have your blood pressure checked every 1 to 2 years. If you have high blood pressure , your doctor may suggest you make some lifestyle changes, such as eating less salt and exercising more. Your doctor may also prescribe medicine to help lower your blood pressure.
What does high cholesterol have to do with heart disease?
Cholesterol is a waxy substance found in all parts of the body. When there is too much cholesterol in your blood, cholesterol can build up on the walls of your arteries and cause blood clots. Cholesterol can clog your arteries and keep your heart from getting the blood it needs. This can cause a heart attack.
There are two types of cholesterol:
Low-density lipoprotein (LDL) is often called the “bad” type of cholesterol because it can clog the arteries that carry blood to your heart. For LDL, lower numbers are better.
High-density lipoprotein (HDL) is known as “good” cholesterol because it takes the bad cholesterol out of your blood and keeps it from building up in your arteries. For HDL, higher numbers are better.
All women age 20 and older should have their blood cholesterol and triglyceride levels checked at least once every 5 years.

There are a large variety of green teas that are available for you, all which have been crafted together in the quest to find alternate flavors with the same health benefits. When one is looking into the different types of teas, it can easily be seen that the combinations that have been made are to create a blend that provide you with the perfect taste. One of the blends that have become popular with this concept is Jasmine Green Tea.

The Jasmine Green Tea that is used comes from a blend of natural sources that are used to create an alternate flavor. This begins with the green tea of Pouching, which is an ancient Chinese blend. This is then combined with Jasmine flowers, which are known for their sweet flavor, as well as their fragrance that adds to the overall effects of the tea.

Typically, the green tea will be blended and made before the Jasmine is added into it. The Jasmine petals that are used will be picked off the flower and stored overnight in a cool place. This helps to bring out the flavor and the fragrance of the flowers. While the flowers are cooling, they are able to bloom, which helps to bring out the scent of the flower, providing for a better mixture of the tea. The quality of the Jasmine Green Tea will then be mixed together. Its quality is based on the fragrance and the sweetened taste that it produces from this mix.

Not only does the Jasmine Green Tea gain its mixture from the cooling and processing that is used, but can also be divided into grades because of the procedure that is used. Because the quality of the grade is based on the fragrance and the taste of the green tea, several will divide the categories by sampling the scent and taste. It is known that the higher grade Jasmine Green Teas will take the process of cooling and mixing a step further. For any higher grade Jasmine Tea, the petals that are used will be absorbed and cooled up to seven times in order to produce the flavor that is desired.

Not only will the Jasmine Green Tea be re-blended for a higher fragrance and flavor, but different types of Jasmine can be added in to create an alternate flavor. There are over 200 species of Jasmine flowers that are known, all coming in the form of shrubs or vines. The different types of Jasmine are divided by the region in which they grow, as well as the colors of the petals. However, it has been noted that each of the types of leaves will produce an alternate flavor, dependent on the species.

Like with other Green Teas, Jasmine tea is one of the ways in which those who process the teas work towards finding the perfect blend. Through the process that is used, as well as the variations that are provided, Jasmine Green Tea is able to produce a fragrance and flavor that gives one a drink of sweetness.

Julie Health writes about the green tea products and the health benefits of green tea at her website.

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