<html> <head> <title>Kinsman Physics Productions :: X-ray Photography</title> <style> TD.thin_border_cell {background:#FFFFFF; border: 1px #000000 solid; padding: 10 text-align: left;} </style> </head> <body bgcolor="#FFFFFF" text="#666666"> <font face="Verdana, Helvetica, Arial, sans-serif" size="1"> <center> <a href="/"><img src="/img/2nd_header_13.jpg" height="105" width="773" border="0" /></a> <table border="0" width="793" cellspacing="10" cellpadding="10" bgcolor="#FFFFFF"> <tr> <td class="thin_border_cell" valign="top"> <font face="Verdana, Helvetica, Arial, sans-serif" size="2"> <img src="/img/xray_title.gif" width="300" height="23" /> <br clear="all"> <a href="xray%20jan24-06/bubblegun.jpg"><img alt="bubble gun" src="bubblegun_th.jpg" border="0" align="right"></a> X-ray Photography (radiography) is the science of exposing an object to very short wavelengths of light and recording the resulting image on some sort of photographic media. In the near future the whole process will be digital, but until the time comes when the digital sensors drop to a price level of the common researcher, the process will be mostly chemical based.</p> <p>The x-ray machine used is an industrial unit used for testing machine parts and electronic circuit boards. The X-ray beam is very different than medical devices, as the source of the x-rays is very small. The small source is comparable to looking at shadows from a very small flashlight. The smaller the light source the sharper the shadow edges. The X-rays can also be adjusted by changing the wavelength and this comparable to visible light changing in color. In X-rays the shorter wavelengths have more energy and can travel through denser materials. The goal is to adjust the wavelength of the beam and the length of exposure, to get the best contrast on the recording medium. The x-rays can be detected by photographic film (negative) and photo paper. The resulting photo is scanned in a digital scanner and the resulting image cleaned up (dust removed, levels of contrast adjusted). The digital image can also have false color added in any one of a number of techniques. The false color is mainly used to highlight areas of interest or to make the image more visually exciting. </p> <p>In particular I am fascinated by the ability of X-rays to penetrate different materials to give an inside view. These images are often complex and quite fascinating in nature. Although most people are well aware of the use of x-rays in medical imaging, I am mainly interested in photographing non-medical objects. Many of these objects are rarely x-rayed, if they have ever been x-rayed. Below are some of my favorite images and explanations on what they are. </p> <br> <a href="xray%20jan24-06/shipworms1.jpg"><img alt="wood" src="shipworms1.jpg" width=" 94" height="150" align="left" border="0" vspace="2" hspace="10"></a> <p>Here is a rather dull piece of driftwood from the shore of the Atlantic. The wood has been infested with shipworms and to the eye looks like a mess. In x-rays the wood can be evaluated for the damage the worms do. The worms are really in the clam family and excrete hard calcium carbonate around their bodies as the burrow into the wood.<br> <br clear="all"> <br> <a href="xray%20jan24-06/termitewood1.jpg"><img alt="termite wood" src="termitewood1.jpg" width=" 117" height="150" border="0" vspace="2" hspace="10" align="right"></a> The shipworm infested wood got me thinking about what our local equivalent of termites would look like in x-rays. It so happened that a friend of mine had a nice collection of termite samples. The wood clearly shows where the termites have eaten. There are several companies that market x-ray devices just for this purpose. <br clear="all"> <p><font><font size="2"><a href="xray%20jan24-06/Russian-doll1.jpg"><img alt="russian doll" src="Russian-doll1.jpg" width=" 93" height="150" border="0" vspace="2" hspace="10" align="left"></a>A stacking wooden Russian doll shows not only how many dolls are inside, but on close inspection one of the paints has a very high x-ray absorption. The doll has several white spots pointed on different parts of the surface, these turn out to be lead paint. <br clear="all"> <br> <p>Various electronics yield different information when x-rayed. Many plastic toys have interesting electronics, gears, motors, and batteries. Below is a toy bubble blower , a camera control unit, a PDA, a plastic clock, and a graphing calculator. <p> <center> <a href="xray%20jan24-06/bubblegun1b.jpg"> <img alt="bubble gun" src="bubblegun1b.jpg" width=" 110" height="147" border="0" vspace="2" hspace="10"></a> <a href="xray%20jan24-06/Timemachinex-ray1-smFC.jpg"><img alt="time machine" src="Timemachinex-ray1-smIFC.jpg" width=" 86" height="144" border="0" vspace="2" hspace="10"></a> <a href="xray%20jan24-06/PDA-1A.jpg"><img alt="PDA" src="PDA-1A.jpg" width=" 187" height="147" border="0" vspace="2" hspace="10"></a> <a href="xray%20jan24-06/CLOCK-2FC.jpg"><img alt="clock" src="CLOCK-2FC.jpg" width=" 156" height="140" border="0" vspace="2" hspace="10"></a> <a href="xray%20jan24-06/calculator.jpg"><img alt="calculator" src="calculator.jpg" width=" 89" height="150" border="0" vspace="2" hspace="10"></a> </center> <br clear="all"> <br> <a href="xray%20jan24-06/paranaFC2.jpg"><img alt="man eating fish" src="paranaFC2.jpg" width=" 150" height="78" border="0" vspace="2" hspace="10" align="right"></a> Applying the high quality x-ray unit to biological specimens often leads to some unexpected discoveries. Here is a piranha that was sold as a souvenir in South America. The specimen shows the many cracked ribs that resulted from the drying process. <br clear="all"> <br> Lately, I have become interested in X-raying fish specimen for scientific texts. Below is a Guitar Fish (Rhincobatus djeddensis) from the Indian Ocean. <br clear="all"> <br> <center> <a href="xray%20jan24-06/guitarfish.jpg"><img alt="Guitar fish" src="guitarfishtmb.jpg" width=" 198" height="72" border="0" vspace="2" hspace="10" align="middle"></a> <a href="xray%20jan24-06/guitarfish-head.jpg"><img alt="Guitar fish" src="guitarfishheadtmb.jpg" width=" 144" height="143" border="0" vspace="2" hspace="10" align="middle"></a> <a href="xray%20jan24-06/guitarfish2.jpg"><img alt="Guitar fish" src="guitarfish2tmb.jpg" width=" 108" height="94" border="0" vspace="2" hspace="10" align="middle"></a> </center> <p>The Guitar fish has many interesting details on close inspection.<br> <br> <br>For more information on <a href="http://www.sciencephotography.com">www.sciencephotography.com</a> please visite our <a href="http://www.sciencephotography.com">main site</a><br> </td> </tr> </table> <br> Kinsman Physics Productions &#149; <a href="http://www.sciencephotography.com">www.sciencephotography.com</a> &#149; <img src="/img/email_graphic.gif" align="middle"> <br> </body> </html>