This study looks at how well a contrast agent called iohexol helps doctors calculate the right dose of a chemotherapy drug named carboplatin for cancer patients. Chemotherapy is a type of treatment that uses drugs to stop cancer cells from growing, dividing, or spreading. Iohexol is a special dye that helps doctors see inside the body more clearly during medical tests.

Key Points:

• The study involves getting iohexol and carboplatin through an IV (a small tube in your vein) and requires blood samples for testing.
• The study is currently only open to men and is expected to last for 3-4 weeks after the treatment.
• Participants must be at least 18 years old, able to follow study requirements, and provide consent.

People with certain medical conditions, like severe allergies or recent kidney problems, cannot take part in the study. Understanding how to correctly dose carboplatin can help improve future cancer treatments, making it important for those who qualify and are interested to consider participation.