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Doctor insights on: Pet Scan For Lung Nodule

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Got results for PET scan on lung nodules. Nodules are "undetermined" cuz of size but parotid glands on both side of neck showed "hot". Any relation?

Got results for PET scan on lung nodules. Nodules are "undetermined" cuz of size but parotid glands on both side of neck showed "hot".  Any relation?

No relation: Parotid glands can have chronic inflammation which will show up on a PET scan just like tumors do. But it is unlikely to be anything significant that should worry you. You can ignore it for the time being. ...Read more

Dr. Guido Davidzon
286 doctors shared insights

Pet Scan (Definition)

Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more


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What is the lowest intake suv on a pet scan(lung nodule)?

What is the lowest  intake suv on a pet scan(lung  nodule)?

Zero: The lowest suv (standardized uptake value - a semiquantitative measure of metabolism) is zero. The maximum suv in a region of interest is called suv max. Generally, if the lung nodule is less than an suv max of 1, it is likely benign. However, there are plenty of non malignant diseases that can have increased FDG uptake, such as healing fungal lung infections, called granulomas. ...Read more

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Will a 6mm lung nodule show up on a pet scan?

Will a 6mm lung nodule show up on a pet scan?

Maybe: Lung nodules smaller than 10 mm (3/8 inch) can be falsely negative on pet because of limitations of the technology. That means the uptake on the scan is not high enough to be suspicious even though the nodule is actually worrisome. However, some small nodules have enough uptake despite their small size. The pet is not a bad idea for a 6 mm nodule, and if positive, means aggressive evaluation. ...Read more

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9mm lung nodule found lower lobe on abdomininal scan. Follow up scan 6 months later nodule grew to 1.5 cm. PET scan no uptake former smoker 15 yrs ago?

Needs Biopsy: Follow the treating Physician's advise. With rapid increase in 6 months; getting tisuue Dx is always very helpful. Other wise you will be worried all the time until another Imaging study is done . Excision Bx is the way to go ( removing the nodule) ...Read more

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Can there be a difference in a CT and pet scan of 1mm in the results of a lung nodule?

Can there be a difference in a CT and pet scan of 1mm in the results of a lung nodule?

Yes: There are differences in techniques between the ct scan with a pet scan and a general ct scan. Additionally, radiologists may measure a nodule slightly differently. Please look at a ruler and realize just how small 1 mm is. Radiologists routinely are measuring things less than 1 cm or about 3/8 of an inch. ...Read more

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Had an MRI of a lung nodule that is non calcified ... Slow growing since 2001... 9mm... Radiologist made diagnoses of it being benign . How can he make such a diagnoses without truly knowing isn't a CT pet scan better to show or even a biopsy?

Had an MRI of a lung nodule that is non calcified ... Slow growing since 2001... 9mm... Radiologist made diagnoses of it being benign . How can he make such a diagnoses without truly knowing isn't a CT pet scan better to show or even a biopsy?

D/w your MD: It looks like a benign tumor--over 11 years- it grows slowly and the size is only 9mm. If this were a cancer, the growth will be way more rapid than this is. A pet scan has some degree of false negativity when the size is < 10mm. A biopsy is invasive and it's not easy to do when the size is small. Would recommend surveillance only, & quit smoking .If you smoke. (btw, ct scan is better than mri). ...Read more

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Are subcentimeter lung nodules that have not changed in size since january assumed to be benign if they do not light up on a pet scan. All are 6 mm?

Not necessarily : Six millimeter nodules are small and may not light up in a pet scan even if malignant. However, the fact they are stable is encouraging. I would guess your doc will keep an eye on them unless there's something else that is suspicious for cancer. Good luck. ...Read more

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Multiple lung nodules measure 2- 6mm all test have been ran all were negative .1.5cm lymph node axilla are all of them to small for pet scan?

Multiple lung nodules measure 2- 6mm all test have been ran all were negative .1.5cm lymph node axilla are all of them to small for pet scan?

maybe: The lower limit of detection for pet scan is ~1cm. The lung nodules are too small but the axillary lymph node should be large enough for pet scan to detect if there is increased metabolic activity. ...Read more

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Can you explain results of chest X-ray led 2 cat scan, which led 2 pet scan. results are multiple nodules. what causes lung nodules?

Can you explain results of chest X-ray led 2 cat scan, which led 2 pet scan. results are multiple nodules. what causes lung nodules?

Multiple: There are many causes for pulmonary nodules, which can be broken down into benign or malignant. There are a large number of causes for benign nodules, and 95% of nodules seen on CT scan are benign. If the nodule is large enough, a biopsy may be recommended. The initial move is to see if the same mass was present on a previous scan. PET scans are used to add information, but should not be done firs ...Read more

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How much CT and pet scans are safe in one year from radiation exposure on 59 yea old woman diagnosis lung nodules. One more year to go for monitoring

How much CT and pet scans are safe in one year from radiation exposure on 59 yea old woman diagnosis lung nodules. One more year to go for monitoring

Check with your ---: Radiologist as they would be give you precise information about the dose of radiation one gets with each scan. Call your hospital's x ray dept and they can put in touch with him/her. Good luck. ...Read more

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What is nodules into a bulla in the right lungs which recommend a pet scan?

What is nodules into a bulla in the right lungs which recommend a pet scan?

Needs evaluation: Pet scan can tell physicians more about whether a lesion has metabolic activity and if they are potentially more concerning. To understand more about why a pet scan was recommended please read here: http://www.Conciergeradiologist.Com/pet-scan.Html. ...Read more

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I'm taking a PET scan of my love tomorrow to check about a nodule on my lung they said I should not take any of my diabetes medicine could you tell me why please?

I'm taking a PET scan of my love tomorrow to check about a nodule on my lung they said I should not take any of my diabetes medicine could you tell me why please?

Instructions: Routine instructions for Pet Scan.You BloodcSugar has to be between 80 and 150.If you BloodcSugar is more than 150 then the scan will be rescheduled . It is routine to stop all diabetic meds on the day of the scan and can be started back.following the scan. It is done as it may cause fluctuation in BloodcSugar ...Read more

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I have a 2 CM nodule and smaller nodules in my lungs. Will be getting a pet scan. How quickly will it spread if it's cancer?

I have a 2 CM nodule and smaller nodules in my lungs. Will be getting a pet scan. How quickly will it spread if it's cancer?

Depends: Cancers spread at different rates. Small cell cancer spreads quickly. Treatment also affects the rate of spread. If the pet scan is positive next step is biopsy. ...Read more

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What to do if I have a 2cm nodule and smaller nodules in my lungs, going in tomorrow for a pet scan. if this is cancer, how quickly will it spread?

What to do if I have a 2cm nodule and smaller nodules in my lungs, going in tomorrow for a pet scan. if this is cancer, how quickly will it spread?

Need evaluation: proceed with PET scan . ultimately you would need to have a biopsy of the lung mass to establish a diagnosis. if you smoke, please quit. God only knows how quickly it will spread. having said that- it will depend of the biology of the cancer- some cancers are indolent/slowly growing, and others are aggressive . PET scan will show if there is any other suspicious area- lymph nodes or organs. ...Read more

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3cm nodule on rt lung hilerregion? Pet scan this am,can scan cause cancer & what are side effects? I'm scared to have cancer &nodule in lowerlft lung!

3cm nodule on rt lung hilerregion? Pet scan this am,can scan cause cancer & what are side effects? I'm scared to have cancer &nodule in lowerlft lung!

PET scan is the answ: PET scan is a safe test. It is the best test to find out if the nodule in your lung is benign(no PET uptake) or Cancerous(increased PET update also called Hot scan. Your doctor will guide you according to the results of your PET scan. Let us know the result when available. ...Read more

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Can pet scan always diagnose /confirm presence of lung cancer or can only give indication and later biopsy is vital to confirm cancer if a nodule seen?

Can pet scan always diagnose /confirm presence of lung cancer or can only give indication and later biopsy is vital to confirm cancer if a nodule seen?

Bx definitive: A positron emission tomography (pet) scan is an imaging test that uses a radioactive substance called a tracer to look for disease in the body. It is often used to determine the treatment of cancer, if it is spreading, or improving, etc. Used in combination with tests such as ct or mri, it can provide a very high index of suspicion for cancer, but a bx is always definitive and used for tx. ...Read more

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If I've had a CT scan of mu lungs and there was a subpleural nodule found 6mm should I get a pet scan? And could this be cancerous?

If I've had a CT scan of mu lungs and there was a subpleural nodule found 6mm should I get a pet scan? And could this be cancerous?

No: The chances of you having cancer at your young age (25) are rare. The odds of a solitary 6mm lung nodule being cancer in your age are even rarer. A biopsy would be more appropriate if your physicians thought this was cancer. ...Read more

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Ct scan from 1 month ago showed my lung nodule grew 1 mm. Will a pet w/ CT tell me if its cancer?

PET scan: Tumors generally have a higher metabolic rate and a pet ct make use of this. Tumor usually lights up on a pet scan. If the tumor nodule is very small it will likely be missed on a pet scan. ...Read more

Lung (Definition)

Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the ...Read more


Nodule (Definition)

Any growth or deposit in the body or on its surface may be casually termed a nodule until its character is determined by the familiarity of the physician with it or by the results of a biopsy if it is not so obvious. The term is casual ...Read more